🦖 Acrocanthosaurus

Acrocanthosaurus Facts for Kids

Acrocanthosaurus was a large meat-eating dinosaur from Early Cretaceous North America. It was not T. rex, but it was one of the biggest predators in its ecosystem. Its name means high-spined lizard because tall spines on its neck, back, and tail likely supported a raised ridge of muscle or tissue.

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Carnivore Early Cretaceous North American forests, floodplains, river systems, coastal plains, Antlers Formation habitats, Trinity Group habitats, muddy trackway sites, and predator-rich dinosaur ecosystems North America 🦐 Aegirocassis

Aegirocassis Facts for Kids

Aegirocassis was a giant suspension-feeding radiodont that swam through seas covering what is now Morocco during the Early Ordovician. It was an ancient relative of arthropods, not a shrimp, crab, or lobster. At more than 2 metres long, it was among the largest animals of its time, yet its comb-like frontal appendages probably gathered plankton and other tiny food from the water.

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Planktivore Early Ordovician open seas, continental shelf waters, plankton-rich surface zones, offshore marine habitats, and soft-bottom environments of the Fezouata Biota Africa 🦖 Albertosaurus

Albertosaurus Facts for Kids

Albertosaurus was a meat-eating tyrannosaur dinosaur from Late Cretaceous Canada. It was not T. rex, but it was a close relative from the same big predator family. Albertosaurus was slimmer and slightly earlier than T. rex, with powerful legs, sharp teeth, two-fingered hands, and fossils famous from Alberta.

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Carnivore Late Cretaceous Alberta floodplains, Horseshoe Canyon Formation habitats, river channels, dry riverbeds, forest edges, coastal plains, Dry Island Buffalo Jump bonebed area, and Canadian dinosaur ecosystems North America 🦖 Alioramus

Alioramus Facts for Kids

Alioramus was a long-snouted tyrannosaurid dinosaur from Late Cretaceous Mongolia. It was not T. rex, but it belonged to the tyrannosaur family. Alioramus had a slim body, long low skull, many teeth, and small bony horns or crests on its face, making it one of the strangest tyrannosaurs.

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Carnivore Late Cretaceous Mongolian floodplains, Nemegt Formation river systems, humid lowlands, sandy channels, wooded river edges, Gobi fossil localities, Tarbosaurus ecosystems, and Asian tyrannosaur habitats Asia 🦖 Allosaurus

Allosaurus Facts for Kids

Allosaurus was a large meat-eating dinosaur from the Late Jurassic Period. It had sharp teeth, strong legs, three-fingered hands, and a big skull, making it one of the best-known predators from Jurassic North America.

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Carnivore Jurassic floodplains and open woodland edges North America, Europe 🦕 Amargasaurus

Amargasaurus Facts for Kids

Amargasaurus was a small sauropod dinosaur from Early Cretaceous Patagonia in Argentina. It was not a meat-eater and not a giant like Argentinosaurus, but it had one of the strangest necks in dinosaur history. Tall paired spines rose from its neck and back, possibly supporting display structures, muscles, or protective features.

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Herbivore Early Cretaceous Patagonian floodplains, La Amarga Formation habitats, river valleys, open woodlands, conifer forests, fern-rich ground cover, dry-season plains, and South American sauropod ecosystems South America 🐋 Ambulocetus

Ambulocetus Facts for Kids

Ambulocetus was an early whale from Eocene Pakistan. It was not a dinosaur and not a modern whale, but a semiaquatic mammal that could move on land and swim in water. Its name means walking whale, and its nearly complete skeleton helped scientists understand how whale ancestors shifted from land toward the sea.

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Carnivore Eocene Pakistan coastal waters, Kuldana Formation shorelines, warm Tethys Sea margins, muddy banks, river mouths, shallow marine habitats, lagoons, and semiaquatic hunting areas Asia 🐘 Amebelodon

Amebelodon Facts for Kids

Amebelodon was a shovel-tusked proboscidean that lived mainly in North America during the Miocene. It was an elephant relative with an elongated lower jaw carrying two flattened incisor tusks. The tusks were narrower than Platybelodon’s broad cutting plate, and wear marks show that Amebelodon used them in several ways, especially stripping and scraping bark rather than constantly digging through swamp mud.

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Herbivore Miocene open woodlands, wooded grasslands, river floodplains, forest edges, seasonal plains, and mixed terrestrial habitats across North America North America 🦁 American Lion

American Lion Facts for Kids

The American lion was one of the largest cats of Ice Age North America. It was not a dinosaur, and it was not exactly the same as a modern African lion. Scientists call it Panthera atrox and study its bones, teeth, and La Brea Tar Pits fossils to understand how it hunted and lived.

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Carnivore Ice Age grasslands, open plains, scrublands, open woodlands, valleys, and tar pit regions North America 🐚 Ammonite

Ammonite Facts for Kids

Ammonites were extinct shelled sea animals related to modern squids, octopuses, and nautiluses. They lived in ancient oceans for millions of years and are famous for their beautiful spiral shells. Ammonites disappeared at the end of the Cretaceous Period, about 66 million years ago.

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Carnivore Ancient oceans, shallow seas, reefs, seafloors, and open marine waters Worldwide 🐻 Amphicyon

Amphicyon Facts for Kids

Amphicyon was a large amphicyonid carnivoran commonly called a bear-dog. It was not a hybrid of a bear and a dog, and it did not belong to either living family. Different species combined powerful jaws, broad feet, flexible bodies, and limbs with both ambush and pursuit features, creating formidable predators and scavengers across the Miocene world.

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Omnivore Miocene woodlands, forest edges, wooded grasslands, river valleys, open plains, and mixed terrestrial habitats Europe, Asia, Africa, North America 🐘 Anancus

Anancus Facts for Kids

Anancus was a large elephant-like proboscidean that lived across Africa, Europe, and Asia from the Late Miocene into the Early Pleistocene. It had a short lower jaw, a hanging trunk, ridged molars, and no lower tusks. Its most spectacular features were two slender upper tusks that projected forward in nearly straight lines and could grow longer than a small car.

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Herbivore Late Miocene to Early Pleistocene woodlands, forest edges, wooded savannas, river valleys, open grasslands, and mixed terrestrial habitats across Afro-Eurasia Africa, Europe, Asia 🪽 Anchiornis

Anchiornis Facts for Kids

Anchiornis was a tiny feathered dinosaur from Jurassic China. It was not a modern bird, but it was close to the bird line and helps scientists understand how feathers and flight-related bodies evolved. Its fossils are so detailed that researchers mapped much of its color pattern, giving kids one of the clearest looks at a real dinosaur costume.

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Carnivore Late Jurassic northeastern Chinese forests, lake edges, tree-rich habitats, volcanic ash fossil beds, Liaoning fossil localities, branchy woodland areas, small-prey ecosystems, and feathered dinosaur habitats Asia 🐺 Andrewsarchus

Andrewsarchus Facts for Kids

Andrewsarchus was a mysterious extinct mammal from Eocene Inner Mongolia. It was not a dinosaur, wolf, or bear. Scientists mostly know it from one enormous skull found by an American Museum of Natural History expedition in 1923, so its full body shape, size, and lifestyle are still debated.

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Omnivore Eocene Inner Mongolian plains, ancient Asian floodplains, dry basins, river margins, open woodland edges, fossil desert sites, and large mammal ecosystems Asia 🪽 Anhanguera

Anhanguera Facts for Kids

Anhanguera was a toothed pterosaur from Early Cretaceous Brazil. It was not a dinosaur, but a flying reptile with long narrow jaws, sharp teeth, head crests, and wings made from skin stretched along a long finger. Its fossils come from the famous Araripe Basin.

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Carnivore Early Cretaceous lagoons, lakes, coastal waters, and nearby cliffs South America 🦕 Ankylosaurus

Ankylosaurus Facts for Kids

Ankylosaurus was a heavily armored plant-eating dinosaur with bony plates across its body and a famous club at the end of its tail. It lived in western North America near the end of the Cretaceous Period, making it one of the last great armored dinosaurs.

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Herbivore Cretaceous forests, floodplains, and woodland edges North America 🦐 Anomalocaris

Anomalocaris Facts for Kids

Anomalocaris was a strange ocean predator from the Cambrian Period. It was not a dinosaur, fish, or reptile, but an early arthropod relative with large eyes, swimming side flaps, two grasping front appendages, and a round mouth. It was one of the biggest predators of its time.

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Carnivore Cambrian oceans, shallow seas, seafloors, reefs, and open marine waters North America, Asia, Australia 🐊 Anteosaurus

Anteosaurus Facts for Kids

Anteosaurus was a giant carnivorous dinocephalian therapsid that lived in what is now South Africa during the Middle Permian. It was not a dinosaur or a crocodile. Its enormous skull carried large incisors, saber-like canines, thickened bony bosses, and powerful jaw muscles, while inner-ear evidence suggests that it was a surprisingly agile terrestrial predator.

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Carnivore Middle Permian river floodplains, seasonal wetlands, dry lowlands, wooded plains, and terrestrial habitats of the South African Karoo Africa 🦕 Apatosaurus

Apatosaurus Facts for Kids

Apatosaurus was a huge plant-eating sauropod dinosaur with a long neck, long tail, small head, and very heavy body. It lived during the Late Jurassic Period in North America and is often remembered because of its long connection with Brontosaurus in dinosaur history.

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Herbivore Jurassic floodplains, forests, and open woodland edges North America 🪽 Archaeopteryx

Archaeopteryx Facts for Kids

Archaeopteryx was a famous early avialan from Late Jurassic Germany. It was not a modern bird, and it was not a giant dinosaur. It sat close to the bird-dinosaur transition, with feathers and wings like a bird, but also teeth, a long bony tail, and clawed fingers like small theropod dinosaurs.

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Carnivore Late Jurassic Solnhofen archipelago, German limestone lagoon islands, coastal forests, rocky shores, low island habitats, tropical lagoons, and fossil-rich limestone environments Europe 🐢 Archelon

Archelon Facts for Kids

Archelon was a giant extinct sea turtle from the Late Cretaceous seas of North America. It was not a dinosaur and not a land tortoise. This enormous marine turtle had powerful flippers, a leathery shell-like covering, a hooked beak, and swam through the Western Interior Seaway while mosasaurs, plesiosaurs, sharks, and toothed diving birds shared the water.

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Carnivore Late Cretaceous Western Interior Seaway, Pierre Shale marine habitats, shallow inland seas, open ocean waters, seafloor feeding areas, nesting beaches, and marine predator ecosystems North America 🐻 Arctotherium

Arctotherium Facts for Kids

Arctotherium was a genus of short-faced bears that lived in South America during the Pleistocene. These bears descended from North American ancestors that crossed the newly formed land connection between the continents. The earliest species, Arctotherium angustidens, included an enormous individual weighing well over a tonne, but evidence from teeth, skulls, and isotopes shows that even this giant probably ate a flexible mixture of meat and plants.

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Omnivore Pleistocene pampas, open grasslands, wooded savannas, river floodplains, rocky shelters, dens, and varied terrestrial habitats across South America South America 🪽 Argentavis

Argentavis Facts for Kids

Argentavis was a gigantic extinct flying bird from Late Miocene Argentina. It was not a dinosaur and not a pterosaur. Argentavis magnificens belonged to the teratorns, a group related to New World vultures, and it was one of the largest flying birds ever known, using huge wings to soar over open landscapes.

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Carnivore Late Miocene Argentine pampas, open grasslands, foothills, mountain slopes, dry plains, savanna-like habitats, thermal-rich skies, and South American scavenger ecosystems South America 🦕 Argentinosaurus

Argentinosaurus Facts for Kids

Argentinosaurus was a gigantic plant-eating sauropod dinosaur from Late Cretaceous Argentina. It had a long neck, long tail, huge body, and four pillar-like legs. Because its fossils are incomplete, scientists use careful estimates to understand just how enormous this titanosaur may have been.

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Herbivore Cretaceous floodplains, forests, and open plains South America 🦏 Arsinoitherium

Arsinoitherium Facts for Kids

Arsinoitherium was a large extinct mammal from Africa and Arabia. It was not a dinosaur and not a rhinoceros, even though it looked a bit like a rhino wearing two enormous horns. Arsinoitherium belonged near the elephant, hyrax, and sea cow side of the mammal family tree and ate plants in warm swampy habitats.

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Herbivore Late Eocene and Oligocene northern African coastal swamps, Fayum lowland forests, river edges, humid floodplains, Arabian Peninsula habitats, marshy vegetation zones, and plant-rich wetlands Africa, Asia 🦣 Astrapotherium

Astrapotherium Facts for Kids

Astrapotherium was a large plant-eating mammal that lived in South America during the Early and Middle Miocene. It was not an elephant, tapir, hippopotamus, or rhinoceros, but a member of the entirely extinct order Astrapotheria. Four enlarged canine teeth formed tusks, while retracted nasal bones suggest a flexible upper lip or short trunk.

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Herbivore Early and Middle Miocene wooded floodplains, humid lowlands, river margins, marshy areas, forest edges, and closed habitats of South America South America 🐻 Atlas Bear

Atlas Bear Facts for Kids

The Atlas Bear was a recently extinct bear from North Africa. It was not a dinosaur and not a lion, but an extinct brown bear population or subspecies. Atlas Bears lived around the Atlas Mountains and nearby areas, and they are remembered as the only bear known from Africa in recent historical times.

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Omnivore Atlas Mountains, North African forests, mountain slopes, cedar woodlands, rocky valleys, scrublands, and Maghreb highlands Africa 🦎 Atopodentatus

Atopodentatus Facts for Kids

Atopodentatus was a strange plant-eating marine reptile that lived in what is now China during the Middle Triassic. It was not a dinosaur. Its skull widened sideways at the front like a hammer, where chisel-shaped teeth scraped plants from rocks. Hundreds of thin teeth farther back then strained the loosened plant pieces from the water.

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Herbivore Middle Triassic shallow coastal seas, algae-covered rocky bottoms, lagoons, nearshore waters, plant-rich seabeds, and warm marine habitats of ancient China Asia 🦖 Aucasaurus

Aucasaurus Facts for Kids

Aucasaurus was a meat-eating abelisaurid dinosaur from Late Cretaceous Patagonia in Argentina. It was not T. rex, but it was related to Carnotaurus. Aucasaurus is especially useful to scientists because it is known from an almost complete skeleton, including tiny reduced arms that show how strange abelisaurid bodies could become.

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Carnivore Late Cretaceous Patagonian floodplains, Anacleto Formation habitats, Neuquén Basin river systems, dry plains, nesting grounds near Auca Mahuevo, open woodlands, and South American abelisaurid ecosystems South America 🐂 Aurochs

Aurochs Facts for Kids

The aurochs was a huge wild cattle species and the wild ancestor of domestic cattle. It was not a dinosaur and not the same as a modern farm cow. Aurochs roamed parts of Europe, Asia, and North Africa for thousands of years before the last known individual died in Poland in 1627.

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Herbivore Forests, grasslands, open woodlands, marshes, river valleys, floodplains, and grazing meadows Europe, Asia, Africa 🦕 Avaceratops

Avaceratops Facts for Kids

Avaceratops was a small horned dinosaur from Late Cretaceous Montana. It was not Triceratops, though it belonged to the same wider ceratopsian group. Avaceratops had a parrot-like beak, a frill at the back of the skull, and probably browsed on plants in wet, forested Judith River habitats.

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Herbivore Late Cretaceous Montana floodplains, Judith River Formation habitats, wet forests, stream channels, lowland woodlands, fern-rich ground cover, coastal plain ecosystems, and North American ceratopsian habitats North America 🪱 Aysheaia

Aysheaia Facts for Kids

Aysheaia was a small soft-bodied lobopodian that walked across the Cambrian seafloor about 505 million years ago. Its worm-like body carried ten pairs of short unjointed legs, many with curved claws, while finger-like structures surrounded the mouth. Aysheaia resembled modern velvet worms, but it belonged to an extinct early panarthropod branch and was not simply a living velvet worm copied into stone.

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Omnivore Middle Cambrian muddy seafloors, sponge communities, soft offshore sediment, low crawling zones, and quiet continental shelf habitats North America 🐉 Azhdarcho

Azhdarcho Facts for Kids

Azhdarcho was a long-necked pterosaur that lived in what is now Uzbekistan during the Late Cretaceous, about 92 million years ago. It was not a dinosaur, although it shared its world with dinosaurs. Fossils show extremely stretched neck bones, wing and leg bones, and pieces of its skull and jaws, but much of its complete appearance must still be reconstructed from relatives.

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Carnivore Late Cretaceous floodplains, river margins, wetlands, woodland edges, sandy channels, and diverse lowland habitats of the Bissekty Formation Asia 🐦 Bachman's Warbler

Bachman's Warbler Facts for Kids

Bachman's Warbler was a small migratory songbird from North America and Cuba. It was not a dinosaur, and it was not a common backyard warbler. It bred in wet forests and cane thickets of the southeastern United States, wintered in Cuba, and was officially delisted by the U.S. Fish and Wildlife Service due to extinction in 2023.

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Insectivore Southeastern U.S. swamp forests, bottomland hardwoods, canebrakes, wet shrublands, river floodplains, and Cuban winter forests North America 🐅 Bali Tiger

Bali Tiger Facts for Kids

The Bali Tiger was a tiger population from the Indonesian island of Bali. It was not a dinosaur and not the same as the Sumatran tiger that still survives. Bali Tigers were the smallest of the modern tiger island forms and vanished after hunting, shrinking forests, and heavy human pressure.

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Carnivore Bali forests, tropical woodlands, mountain slopes, scrubby habitats, plantation edges, river valleys, and island forest remnants Asia 🪽 Bambiraptor

Bambiraptor Facts for Kids

Bambiraptor was a tiny meat-eating dinosaur from Late Cretaceous Montana. It was not Velociraptor, though it was a close raptor relative in the dromaeosaurid family. The famous fossil was found by a 14-year-old on a ranch, and its bird-like skeleton helped scientists study links between small dinosaurs and birds.

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Carnivore Late Cretaceous Montana floodplains, Two Medicine Formation habitats, wooded river margins, seasonal plains, nesting areas, underbrush hunting zones, ranch fossil localities, and small raptor ecosystems North America 🐊 Barinasuchus

Barinasuchus Facts for Kids

Barinasuchus was a giant sebecid crocodyliform that hunted on land in Cenozoic South America. It was a distant crocodile relative, not a dinosaur or a modern crocodile that simply left the water. Its known fossils are mostly a damaged snout and lower jaw, but the tall narrow skull and blade-like serrated teeth identify it as a formidable terrestrial predator.

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Carnivore Eocene and Miocene floodplains, open woodlands, river valleys, dry lowlands, and terrestrial habitats across northern and western South America South America 🦕 Barosaurus

Barosaurus Facts for Kids

Barosaurus was a giant long-necked sauropod dinosaur from the Late Jurassic. It was not a meat-eater and not the same as Diplodocus, though it was a close diplodocid relative. Barosaurus is famous for its extra-long neck, long whip-like tail, plant diet, Morrison Formation fossils, and a dramatic rearing mount at the American Museum of Natural History.

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Herbivore Late Jurassic Morrison Formation floodplains, western North American river valleys, semi-arid seasonal plains, conifer woodlands, fern-rich habitats, Sundance Sea margins, sauropod browsing areas, and Allosaurus predator ecosystems North America, Africa 🐋 Basilosaurus

Basilosaurus Facts for Kids

Basilosaurus was a long-bodied ancient whale from the Late Eocene. It was not a dinosaur or a lizard, even though its name means king lizard because early scientists first misunderstood its fossils. Basilosaurus lived in warm seas, had sharp teeth, tiny external hind limbs, and was a top ocean predator before modern whales evolved.

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Carnivore Late Eocene warm shallow seas, southeastern North American marine deposits, North African Tethys Sea habitats, Egyptian Wadi Al-Hitan waters, Jordanian sea deposits, open coastal waters, and predator-rich marine ecosystems North America, Africa, Asia 🐦 Bathornis

Bathornis Facts for Kids

Bathornis was a genus of long-legged terrestrial birds that lived in North America from the Late Eocene into the Early Miocene. It belonged to Cariamiformes, the branch containing living seriemas and extinct terror birds, but Bathornis formed its own family, Bathornithidae. Short wings, powerful legs, a large skull, and a hooked beak indicate a flightless ground predator, although the genus includes several species of different sizes known from fossils of varying completeness.

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Carnivore Late Eocene to Early Miocene floodplains, wetlands, open woodlands, grasslands, river valleys, and plains of western and central North America North America 🐸 Beelzebufo

Beelzebufo Facts for Kids

Beelzebufo was a large, heavily built frog that lived in Madagascar near the end of the Cretaceous Period. Its name means devil toad, but it was a true frog, not a toad. A broad skull, rough reinforced bones, small teeth, and powerful jaws suggest that it was a sit-and-wait predator capable of gripping surprisingly large prey.

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Carnivore Late Cretaceous seasonally dry floodplains, river channels, sandy wetlands, temporary ponds, scrubby vegetation, and semi-arid lowlands of Madagascar Africa 🪽 Beipiaosaurus

Beipiaosaurus Facts for Kids

Beipiaosaurus was a strange feathered theropod dinosaur from Early Cretaceous China. It was not a bird and not a giant like Therizinosaurus, but it belonged to the therizinosaur branch. Beipiaosaurus had long arms, big claws, a pot-bellied plant-eating body plan, and unusual feathers including broad ribbon-like filaments.

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Herbivore Early Cretaceous northeastern Chinese forests, Yixian Formation lake edges, volcanic ash fossil beds, Liaoning woodland habitats, fern-rich ground cover, leafy feeding areas, small animal habitats, and feathered dinosaur ecosystems Asia 🦌 Bluebuck

Bluebuck Facts for Kids

The Bluebuck, also called the blue antelope, was a recently extinct antelope from South Africa. It was not a dinosaur and not actually bright blue. Its coat looked bluish-gray in some light, and it was related to roan antelopes and sable antelopes.

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Herbivore South African coastal grasslands, Cape shrublands, open plains, grassy fynbos edges, dry grazing habitats, and lowland pastures Africa 🐕 Borophagus

Borophagus Facts for Kids

Borophagus was a stocky bone-crushing dog that lived in North America during the later Miocene and Pliocene. It was a true canid, but it belonged to the extinct borophagine branch rather than the wolf, fox, or domestic-dog branch. A deep skull, strong jaw muscles, and enlarged crushing teeth allowed it to eat flesh, crack bones, and reach nutritious marrow.

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Carnivore Late Miocene and Pliocene grasslands, open woodlands, river valleys, scrub, seasonal plains, and mixed terrestrial habitats across North America North America 🐟 Bothriolepis

Bothriolepis Facts for Kids

Bothriolepis was an armored fish that lived during the Devonian Period. It belonged to the antiarch placoderms, an extinct branch of early jawed vertebrates. Thick bony plates protected its head and the front of its body, while jointed armored pectoral appendages projected from the sides. Most species were small bottom feeders, although the giant Bothriolepis rex grew much larger.

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Omnivore Middle to Late Devonian rivers, lakes, floodplains, estuaries, coastal shallows, muddy bottoms, and nearshore waters across ancient continents Worldwide 🦕 Brachiosaurus

Brachiosaurus Facts for Kids

Brachiosaurus was a giant plant-eating sauropod dinosaur with a long neck, small head, huge body, and front legs longer than its back legs. It lived during the Late Jurassic Period and used its tall body to reach leaves many other dinosaurs could not reach.

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Herbivore Jurassic floodplains and tall forest edges North America 🦜 Broad-Billed Parrot

Broad-Billed Parrot Facts for Kids

The Broad-Billed Parrot was a large extinct parrot from Mauritius. It was not a dinosaur and not the same as a macaw or cockatoo. This island bird had a huge head, a powerful beak, and a mysterious life known from old drawings, bones, and short historical accounts.

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Herbivore Mauritius forests, palm groves, native woodlands, island lowlands, fruiting trees, nesting sites, and Mascarene island habitats Africa 🐾 Broad-Faced Potoroo

Broad-Faced Potoroo Facts for Kids

The Broad-Faced Potoroo was a small extinct marsupial from southwestern Australia. It was not a dinosaur or a rat, although potoroos are sometimes called rat-kangaroos. Scientists know it from a few specimens, subfossil bones, and old records, which makes this little potoroo a museum detective story with whiskers.

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Omnivore Southwestern Australian semi-arid coastal districts, shrublands, open sandy country, low scrub, dry plains, Kangaroo Island subfossil sites, and southern Australian habitats Oceania 🐦 Brontornis

Brontornis Facts for Kids

Brontornis was an enormous flightless bird that lived in Patagonia during the Early and Middle Miocene. For many years it was portrayed as the heaviest terror bird, but its identity remains one of fossil-bird science’s liveliest puzzles. Some analyses place it near terror birds and seriemas, while others recover it among giant fowl related to Gastornis and Australia’s mihirungs. Its heavy legs show a slow, weight-supporting build, and recent work has strengthened the possibility that it ate plants rather than hunting like a classic terror bird.

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Herbivore Early and Middle Miocene open woodlands, grasslands, river floodplains, shrublands, and temperate plains of southern Patagonia South America 🦏 Brontotherium

Brontotherium Facts for Kids

Brontotherium is a famous old name connected with huge extinct mammals now often placed with Megacerops and other brontotheres. It was not a dinosaur and not a rhinoceros. These thunder beasts were odd-toed hoofed mammals from Eocene North America, with massive bodies, paired nose horns, and a plant-eating lifestyle.

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Herbivore Late Eocene North American open woodlands, forest edges, floodplains, river valleys, leafy browsing habitats, plains, Badlands fossil deposits, and warm temperate ecosystems North America 🦌 Bubal Hartebeest

Bubal Hartebeest Facts for Kids

The Bubal Hartebeest was a recently extinct antelope from North Africa. It was not a dinosaur and not a cow, though it belonged to the same large hoofed mammal family as cattle and antelopes. This sandy-colored hartebeest lived in dry grasslands and desert-edge habitats, and the last known individual was shot in Algeria in 1925.

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Herbivore North African dry grasslands, desert-edge plains, semi-arid savannas, scrublands, open steppe, and grazing habitats Africa 🦕 Camarasaurus

Camarasaurus Facts for Kids

Camarasaurus was a long-necked sauropod dinosaur from Late Jurassic North America. It was not a meat-eater and not as extremely long as Diplodocus, but it was one of the most common sauropods in the Morrison Formation. Camarasaurus had a boxy skull, spoon-shaped teeth, chambered vertebrae, and a strong bite for tough plants.

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Herbivore Late Jurassic Morrison Formation floodplains, western North American river channels, semi-arid seasonal plains, lake margins, conifer woodlands, fern-rich ground cover, Carnegie Quarry habitats, and sauropod browsing ecosystems North America 🐙 Cameroceras

Cameroceras Facts for Kids

Cameroceras was a straight-shelled cephalopod that lived mainly in warm Ordovician seas. It was a mollusc related to modern octopuses, squid, cuttlefish, and nautiluses, not a fish or dinosaur. Its cone-shaped shell was divided into chambers and contained an unusually large siphuncle that helped control buoyancy. Some shells exceeded 2 metres, but famous claims of 9-metre Cameroceras are not securely supported.

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Carnivore Middle to Late Ordovician tropical shallow seas, continental shelves, reef margins, open marine waters, and seafloors around Laurentia, Baltica, and Siberia North America, Europe, Asia 🦕 Camptosaurus

Camptosaurus Facts for Kids

Camptosaurus was a plant-eating ornithopod dinosaur from the Late Jurassic. It was not a duck-billed dinosaur, but it was related to the broader plant-eating line that later produced big hadrosaurs. Camptosaurus had a beak, strong hind legs, useful front limbs, and could probably move on two legs or all fours while browsing in Morrison Formation habitats.

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Herbivore Late Jurassic Morrison Formation floodplains, western North American river valleys, open woodlands, fern-rich ground cover, cycads and conifers, semi-arid seasonal plains, lake margins, and medium herbivore ecosystems North America, Europe 🦐 Canadaspis

Canadaspis Facts for Kids

Canadaspis was a small bivalved arthropod that lived near the Cambrian seafloor about 505 million years ago. Two shell-like valves covered much of its front body, while jointed limbs underneath helped it walk, swim, breathe, and move food toward its mouth. Modern research places it among early mandibulates, the broad arthropod branch that later includes crustaceans, insects, and myriapods.

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Omnivore Middle Cambrian muddy seafloors, low swimming zones above sediment, quiet offshore shelf waters, sponge communities, and particle-rich bottom habitats North America 🐢 Carbonemys

Carbonemys Facts for Kids

Carbonemys was a giant extinct freshwater turtle from Paleocene Colombia. It was not a dinosaur and not a sea turtle. Its name means coal turtle because the fossil was found in the Cerrejón coal mine, the same hot ancient rainforest world famous for Titanoboa and other giant reptiles.

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Omnivore Paleocene Colombian tropical rainforest, Cerrejón Formation swamps, coal-swamp waterways, river channels, wetland forests, turtle nesting areas, and giant reptile habitats South America 🦖 Carcharodontosaurus

Carcharodontosaurus Facts for Kids

Carcharodontosaurus was a huge meat-eating dinosaur from Cretaceous North Africa. Its name means shark-toothed lizard because its teeth had sharp edges like those of some sharks, making it one of the most famous giant predators from ancient Africa.

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Carnivore Cretaceous river plains, coastal plains, and dry forest edges Africa 🦭 Caribbean Monk Seal

Caribbean Monk Seal Facts for Kids

The Caribbean Monk Seal was a recently extinct seal that lived in the Caribbean Sea and Gulf of Mexico. It was not a dinosaur or sea lion, but a true seal adapted to warm tropical waters. The last confirmed sighting was in 1952, and the species was declared extinct in 2008.

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Carnivore Caribbean beaches, sandbars, rocky coasts, coral reef edges, warm shallow seas, and Gulf of Mexico waters North America 🦖 Carnotaurus

Carnotaurus Facts for Kids

Carnotaurus was a meat-eating dinosaur from South America with a deep skull, sharp teeth, very short arms, long legs, and two horn-like bumps above its eyes. It lived during the Late Cretaceous Period and is one of the most recognizable horned predators.

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Carnivore Cretaceous plains, forests, and river floodplains South America 🦜 Carolina Parakeet

Carolina Parakeet Facts for Kids

The Carolina parakeet was a colorful recently extinct parrot from the eastern and central United States. It was not a dinosaur, and it was the only parrot species native to the United States. It lived in forests, swamps, and river valleys, but disappeared in the early 1900s after habitat loss, hunting, and other pressures.

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Herbivore Eastern and central North American forests, swamps, wooded river valleys, wetlands, and farmland edges North America 🐅 Caspian Tiger

Caspian Tiger Facts for Kids

The Caspian Tiger was a tiger population that once lived across parts of Central Asia, the Caucasus, northern Iran, eastern Turkey, and nearby regions. It was not a dinosaur and not a sea animal, despite the Caspian name. This tiger used river forests, reed beds, and tugai habitats before disappearing in the 1900s.

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Carnivore Central Asian river corridors, tugai forests, reed beds, thickets, sparse woodlands, Caspian region wetlands, and desert-edge waterways Asia, Europe 🦫 Castoroides

Castoroides Facts for Kids

Castoroides was a giant extinct beaver from Ice Age North America. It was not a dinosaur, and it was much larger than modern beavers. Castoroides lived near lakes, wetlands, and waterways, but scientists are cautious about saying it built dams like modern beavers because the evidence is not clear.

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Herbivore Ice Age wetlands, ponds, lakes, marshes, swamps, rivers, and slow-moving waterways North America 🪽 Caulkicephalus

Caulkicephalus Facts for Kids

Caulkicephalus was a toothed pterosaur from the Early Cretaceous of the Isle of Wight in England. It was not a dinosaur, but a flying reptile with a long narrow snout, large front teeth, three unusually small tooth positions, and separate crests on its snout and the back of its skull. Scientists named it from partial skull, wing, and other bones found near Yaverland.

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Carnivore Early Cretaceous floodplains, river channels, coastal lowlands, forested wetlands, lagoons, and plant-rich habitats of the Wessex Formation Europe 🐻 Cave Bear

Cave Bear Facts for Kids

The cave bear was a large Ice Age bear that lived in Europe and western Asia. It was not a dinosaur, and it was not the same as a modern brown bear. Cave bears are famous because many of their bones were found in caves, where they likely hibernated during cold seasons.

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Omnivore Ice Age caves, forests, mountain valleys, open woodlands, grasslands, and rocky shelters Europe, Asia 🦁 Cave Lion

Cave Lion Facts for Kids

The cave lion was a large extinct cat from the Ice Age. It was not a dinosaur and was not the same as a modern lion, though it was closely related. Cave lions lived across cold northern landscapes, hunted large prey, appeared in ancient art, and even left frozen cub fossils in Siberia.

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Carnivore Ice Age mammoth steppe, cold grasslands, open woodlands, caves, rocky areas, and tundra edges Europe, Asia, North America 🪽 Cearadactylus

Cearadactylus Facts for Kids

Cearadactylus is the historic name of a large toothed pterosaur from the Early Cretaceous Romualdo Formation of northeastern Brazil. It was not a dinosaur. Scientists know it mainly from an incomplete skull and lower jaw with a widened front and large grabbing teeth. Its family position has changed several times, and a 2025 study proposed that Cearadactylus atrox may be the same species as Brasileodactylus araripensis.

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Carnivore Early Cretaceous coastal lagoons, shallow waterways, river mouths, warm lowlands, and shoreline habitats of the Romualdo Formation South America 🦖 Ceratosaurus

Ceratosaurus Facts for Kids

Ceratosaurus was a meat-eating dinosaur from the Late Jurassic. It was not T. rex and not Allosaurus, though it lived in some of the same ecosystems as Allosaurus. Ceratosaurus had a horn on its nose, smaller horn bumps above its eyes, deep jaws, blade-like teeth, short but useful arms, and a row of small bony plates along its back.

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Carnivore Late Jurassic Morrison Formation floodplains, western North American river valleys, semi-arid seasonal plains, forest edges, Portugal coastal habitats, muddy channels, sauropod ecosystems, and Allosaurus predator neighborhoods North America, Europe 🐾 Chalicotherium

Chalicotherium Facts for Kids

Chalicotherium was a strange extinct hoofed mammal from the Miocene. It was not a dinosaur, horse, gorilla, or sloth, even though it looked like a fossil mash-up of several animals. This odd-toed plant eater had long clawed front limbs, shorter back legs, and probably used its claws to pull leafy branches closer.

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Herbivore Miocene European and Asian forests, open woodlands, leafy browsing areas, river margins, wooded savannas, fruiting trees, forest edges, and branch-pulling feeding habitats Europe, Asia 🐦 Choiseul Pigeon

Choiseul Pigeon Facts for Kids

The Choiseul Pigeon was a recently extinct pigeon from Choiseul Island in the Solomon Islands. It was not a dinosaur and not a city pigeon. This large crested ground bird lived in island forests, was known locally as the kuvojo, and has had no confirmed records since 1904.

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Herbivore Choiseul Island lowland forests, coastal forests, forest floors, swampy forest edges, island thickets, nesting areas, and Solomon Islands habitats Oceania 🦇 Christmas Island Pipistrelle

Christmas Island Pipistrelle Facts for Kids

The Christmas Island Pipistrelle was a tiny bat found only on Christmas Island, an Australian territory in the Indian Ocean. It was not a bird or flying mouse, but a small insect-eating bat. The last known bat was detected by its call in August 2009, and the species was later declared extinct.

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Insectivore Christmas Island primary forests, forest edges, tracks, vegetation gaps, regrowth areas, tree roosts, and island forest habitats Asia, Oceania 🪽 Citipati

Citipati Facts for Kids

Citipati was a bird-like oviraptorid dinosaur from Late Cretaceous Mongolia. It was not a bird and not an egg thief in the old-fashioned sense. Famous Citipati fossils show adults sitting over nests of eggs in a bird-like brooding posture, helping scientists understand that some dinosaurs guarded their nests much like birds do today.

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Omnivore Late Cretaceous Mongolian desert dunes, Djadokhta Formation habitats, Ukhaa Tolgod nesting sites, sandy floodplains, dry scrublands, nest colonies, egg-laying grounds, and bird-like dinosaur ecosystems Asia 🦈 Cladoselache

Cladoselache Facts for Kids

Cladoselache was an early shark-like fish from the Late Devonian Period. It was not a dinosaur or marine reptile, but an ancient cartilaginous fish with a streamlined body, forked tail, smooth grasping teeth, and famous fossils from the Cleveland Shale of Ohio.

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Carnivore Devonian oceans, shallow seas, reefs, and open marine waters North America 🦖 Coelophysis

Coelophysis Facts for Kids

Coelophysis was a slender meat-eating dinosaur from the Late Triassic. It was not T. rex and not a giant predator, but it was one of the best-known early dinosaurs. Thousands of bones from Ghost Ranch in New Mexico help scientists study its long neck, hollow bones, sharp teeth, fast legs, and life in ancient desert-like floodplains.

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Carnivore Late Triassic New Mexico floodplains, Chinle Formation red siltstone beds, Ghost Ranch quarry habitats, seasonal river channels, semi-arid basins, pond edges, small reptile ecosystems, and early dinosaur landscapes North America 🦖 Compsognathus

Compsognathus Facts for Kids

Compsognathus was a small meat-eating dinosaur from Late Jurassic Europe. It had a light body, long tail, strong back legs, tiny arms, and sharp teeth. Fossils even show clues about what it ate, making this little dinosaur especially interesting to scientists.

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Carnivore Late Jurassic islands, lagoons, and coastal habitats Europe 🦖 Concavenator

Concavenator Facts for Kids

Concavenator was a meat-eating dinosaur from Early Cretaceous Spain. It was not T. rex, but it belonged near the shark-toothed carcharodontosaurian dinosaurs. Concavenator is famous for two very tall backbone spines in front of its hips, creating a strange hump or ridge, plus debated bumps on its arm bone that some scientists linked to feather-like structures.

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Carnivore Early Cretaceous Spanish wetlands, Las Hoyas lake environments, La Huérguina Formation habitats, freshwater margins, forested floodplains, limestone fossil beds, small prey habitats, and European predator ecosystems Europe 🐦 Confuciusornis

Confuciusornis Facts for Kids

Confuciusornis was an early beaked bird from Early Cretaceous China. It was not a modern bird, but it already had a toothless beak, feathers, wings, and a short bony tail ending in a pygostyle. Hundreds of fossils have been found, making it one of the best-known birds from the dinosaur age.

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Omnivore Early Cretaceous northeastern Chinese forests, Jehol lake shores, Yixian Formation habitats, Jiufotang Formation habitats, volcanic ash fossil beds, wooded wetlands, and freshwater-edge ecosystems Asia 🦕 Corythosaurus

Corythosaurus Facts for Kids

Corythosaurus was a duck-billed plant-eating dinosaur with a tall helmet-like crest on its head. It lived during the Late Cretaceous Period in North America, and scientists think its hollow crest may have helped it make sounds or recognize others of its kind.

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Herbivore Cretaceous forests, floodplains, and coastal plains North America 🦎 Cotylorhynchus

Cotylorhynchus Facts for Kids

Cotylorhynchus was a large plant-eating caseid synapsid from the Early Permian of North America. It was not a dinosaur and was more closely related to mammals than to reptiles such as lizards. Its tiny head, enormous barrel-shaped trunk, short powerful limbs, and specialised teeth formed one of the strangest herbivore body plans of the Paleozoic Era.

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Herbivore Early Permian dry lowlands, monsoonal floodplains, seasonal wetlands, red-mud plains, scrubby terrestrial habitats, and upland environments of Oklahoma and Texas North America 🦘 Crescent Nailtail Wallaby

Crescent Nailtail Wallaby Facts for Kids

The Crescent Nailtail Wallaby, also called the worong, was a recently extinct Australian marsupial. It was not a dinosaur or a kangaroo, but a small wallaby with a strange horny nail-like tip on its tail and pale crescent markings on its body. It lived in scrublands, woodlands, and arid country before disappearing in the 1900s.

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Herbivore Southwestern and central Australian scrublands, arid woodlands, mulga country, dense thickets, low scrub, open sandy areas, and hollow-log shelter habitats Oceania 🦈 Cretoxyrhina

Cretoxyrhina Facts for Kids

Cretoxyrhina was a large predatory shark that hunted in Late Cretaceous seas while mosasaurs, plesiosaurs, and giant fish shared the water. It was not a dinosaur. The best-known species, Cretoxyrhina mantelli, commonly grew around 5 to 6 metres long, while some specimens may have been larger. Its broad, sharp teeth earned it the informal nickname Ginsu shark.

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Carnivore Late Cretaceous open oceans, continental shelf waters, warm inland seas, pelagic hunting grounds, coastal marine basins, and the Western Interior Seaway North America, Europe, Asia, Africa, Australia 🦖 Cryolophosaurus

Cryolophosaurus Facts for Kids

Cryolophosaurus was a meat-eating dinosaur from Early Jurassic Antarctica. It was not T. rex and not a polar bear dinosaur. Antarctica was much warmer when Cryolophosaurus lived, with forests and volcanic landscapes. This theropod is famous for a sideways crest across the top of its skull, giving it one of the flashiest dinosaur hairstyles.

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Carnivore Early Jurassic Antarctic forests, Hanson Formation habitats, Mount Kirkpatrick slopes, volcanic floodplains, polar woodlands, river channels, warm-season Antarctic ecosystems, and southern Gondwana predator habitats Antarctica 🐬 Cryptoclidus

Cryptoclidus Facts for Kids

Cryptoclidus was a long-necked plesiosaur that lived in warm seas covering part of what is now England during the Middle Jurassic. It was not a dinosaur. Adults were around 4 metres long and had a small head, a barrel-shaped body, four powerful flippers, and many slender teeth that could trap small, slippery prey.

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Carnivore Middle Jurassic shallow seas, warm continental shelf waters, offshore mud-bottom habitats, coastal channels, island margins, and ammonite-rich marine environments Europe 🦜 Cuban Macaw

Cuban Macaw Facts for Kids

The Cuban Macaw was a colorful extinct parrot from Cuba and nearby Isla de la Juventud. It was not a dinosaur and not the same as the Scarlet Macaw, though it looked similar. This red, blue, and yellow macaw lived in Caribbean forests and disappeared in the late 1800s after hunting, trapping, and habitat loss.

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Herbivore Cuban forests, palm groves, woodlands, savanna edges, tree hollows, island lowlands, and Isla de la Juventud habitats North America 🐬 Cymbospondylus

Cymbospondylus Facts for Kids

Cymbospondylus was an early ichthyosaur that lived in Triassic seas. Different species varied greatly in size, but the giant Cymbospondylus youngorum may have exceeded 17 metres in length and had a skull around 2 metres long. Its discovery showed that ichthyosaurs evolved enormous bodies surprisingly soon after their ancestors returned to the ocean.

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Carnivore Triassic open seas, continental shelf waters, offshore marine basins, warm coastal oceans, deep channels, and fish-rich pelagic habitats North America, Europe 🐕 Cynognathus

Cynognathus Facts for Kids

Cynognathus was a large meat-eating cynodont that lived across southern Pangaea during the Middle Triassic. It was not a dinosaur or a mammal, but it belonged to the therapsid branch that eventually produced mammals. Its enormous head carried specialised incisors, canines, and slicing postcanine teeth, while a secondary palate allowed it to breathe as food remained in its mouth.

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Carnivore Middle Triassic river floodplains, seasonal dry plains, wooded valleys, stream margins, open terrestrial habitats, and cool southern environments across Gondwana Africa, South America, Antarctica 🐗 Daeodon

Daeodon Facts for Kids

Daeodon was a giant extinct entelodont from North America. It was not a dinosaur and not a true pig, even though entelodonts are often nicknamed hell pigs. Daeodon had a huge skull, long legs, two-toed hooves, powerful jaws, and probably ate a mixed diet that included carrion, roots, plants, and animal foods.

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Omnivore Late Oligocene and early Miocene North American plains, open woodlands, grassland edges, floodplains, river valleys, dry basins, John Day habitats, and scavenging areas North America 🌊 Dakosaurus

Dakosaurus Facts for Kids

Dakosaurus was a marine crocodyliform from the Jurassic and Cretaceous seas. It was not a dinosaur, but a sea-going relative of crocodiles with a deep skull, sharp serrated teeth, flipper-like limbs, and a body adapted for swimming after prey in ancient oceans.

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Carnivore Jurassic and Cretaceous oceans, coastal waters, and open marine habitats Europe, South America 🦖 Daspletosaurus

Daspletosaurus Facts for Kids

Daspletosaurus was a powerful tyrannosaurid dinosaur from Late Cretaceous North America. It was not T. rex, but it was a close relative with a deep skull, strong jaws, two-fingered hands, and banana-shaped teeth. Daspletosaurus lived in places that are now Alberta and Montana before later tyrannosaurs took over the spotlight.

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Carnivore Late Cretaceous northern Laramidia floodplains, Alberta Dinosaur Park and Oldman Formation habitats, Montana Two Medicine Formation habitats, river channels, coastal plains, forest edges, horned dinosaur ecosystems, and tyrannosaur predator territories North America 🦖 Deinocheirus

Deinocheirus Facts for Kids

Deinocheirus was a giant, strange-looking dinosaur from Late Cretaceous Mongolia. It was not a duck-billed hadrosaur and not a T. rex, but the largest known ornithomimosaur. For decades, scientists knew only its enormous arms and hands, until more complete skeletons revealed a wide snout, tall back spines, bulky body, and broad feet.

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Omnivore Late Cretaceous Mongolian floodplains, Nemegt Formation river systems, wet lowlands, muddy channels, lake margins, plant-rich habitats, fish-bearing waters, and giant ornithomimosaur ecosystems Asia 🦖 Deinonychus

Deinonychus Facts for Kids

Deinonychus was a fast-looking meat-eating dinosaur from Early Cretaceous North America. It had sharp teeth, grasping hands, a long stiff tail, and a famous curved claw on the second toe of each foot. This dinosaur helped change how scientists imagined active, bird-like dinosaurs.

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Carnivore Cretaceous forests, floodplains, and open woodland edges North America 🐊 Deinosuchus

Deinosuchus Facts for Kids

Deinosuchus was a giant extinct alligatoroid from Late Cretaceous North America. It was not a dinosaur and not a modern crocodile, though it looked like a nightmare cousin of both alligators and crocodiles. This huge river and coastal predator had crushing teeth, armored skin, and even left bite marks on some dinosaur bones.

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Carnivore Late Cretaceous North American rivers, coastal wetlands, swamps, estuaries, floodplains, shoreline forests, turtle-rich waterways, and dinosaur drinking sites North America 🐘 Deinotherium

Deinotherium Facts for Kids

Deinotherium was a giant proboscidean that lived across Africa, Europe, and Asia for millions of years. It resembled an elephant in its column-like legs and trunk, but it had no long upper tusks. Instead, a pair of enlarged lower incisors curved downward and backward from the front of the jaw, creating one of the strangest heads in mammal history.

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Herbivore Miocene and Pliocene woodlands, forest edges, wooded floodplains, river valleys, savannas with browse, and terrestrial habitats across the Old World Africa, Europe, Asia 🦘 Desert Rat-Kangaroo

Desert Rat-Kangaroo Facts for Kids

The Desert Rat-Kangaroo, also called the desert bettong or oolacunta, was a small hopping marsupial from central Australia. It was not a rat and not a true kangaroo, though it hopped like one. It disappeared, was rediscovered in 1931, then vanished again after its last confirmed record in 1935.

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Herbivore Central Australian deserts, Lake Eyre basin, clay pans, loamy flats, sand ridges, gibber plains, saltbush areas, shrub cover, and shallow nest sites Oceania 🦛 Desmostylus

Desmostylus Facts for Kids

Desmostylus was a large aquatic mammal that lived around the North Pacific during the Late Oligocene and Miocene. It belonged to Desmostylia, an extinct order with no living members. A long skull, forward-pointing tusk-like teeth, stout limbs, and molars built from fused vertical columns gave it a body and mouth unlike those of any modern mammal.

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Herbivore Late Oligocene and Miocene coastal seas, estuaries, river mouths, shallow marine waters, freshwater-influenced bays, and open North Pacific habitats North America, Asia 🦕 Diabloceratops

Diabloceratops Facts for Kids

Diabloceratops was a horned dinosaur from Late Cretaceous Utah. It was not Triceratops, but it belonged to the ceratopsian family and lived millions of years earlier. Its name means devil-horned face because it had dramatic horns and long curved spikes on its frill, giving it one of the boldest skull shapes among early centrosaurines.

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Herbivore Late Cretaceous southern Utah floodplains, Wahweap Formation habitats, Grand Staircase-Escalante river systems, wet seasonal lowlands, coastal plain forests, low vegetation zones, and southern Laramidian dinosaur ecosystems North America 🦖 Dilophosaurus

Dilophosaurus Facts for Kids

Dilophosaurus was a large meat-eating dinosaur from Early Jurassic North America. It had two thin crests on its head, sharp teeth, strong legs, and a long tail. Movie versions gave it a neck frill and venom, but fossils do not show evidence for either one.

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Carnivore Early Jurassic desert floodplains, river edges, and dry plains North America 🦎 Dimetrodon

Dimetrodon Facts for Kids

Dimetrodon was a sail-backed predatory synapsid that lived during the Early Permian, long before the first dinosaurs. It was more closely related to mammals than to dinosaurs, although it was not a mammal or a direct ancestor of modern mammals. Tall neural spines supported its famous back sail, while differently sized teeth helped it grip and slice prey.

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Carnivore Early Permian river floodplains, seasonal wetlands, dry red-bed plains, forest edges, lake margins, and lowland habitats of North America and Europe North America, Europe 🪽 Dimorphodon

Dimorphodon Facts for Kids

Dimorphodon was an extinct flying reptile from Early Jurassic Europe. It was not a dinosaur, but a pterosaur with wings, a big head, a long tail, and two different types of teeth. Fossils from England helped scientists see that early pterosaurs came in many shapes and sizes.

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Carnivore Early Jurassic cliffs, coastal areas, island edges, and nearby forests Europe 🌷 Dinomischus

Dinomischus Facts for Kids

Dinomischus was a tiny stalked animal that lived attached to the Cambrian seafloor. It looked a little like a flower, with a cup-shaped body held above the mud by a slender stem and surrounded by a ring of plate-like bracts. It probably filtered tiny food particles from seawater, and recent studies suggest that Dinomischus may belong near the early evolutionary branch of comb jellies.

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Planktivore Middle Cambrian muddy seafloors, quiet offshore shelf habitats, low-current areas above sediment, sponge communities, and particle-rich bottom waters North America 🪃 Diplocaulus

Diplocaulus Facts for Kids

Diplocaulus was a strange aquatic tetrapod that lived in North American rivers and wetlands during the Late Carboniferous and Early Permian. It was not a dinosaur or a true modern salamander. Adults had an unmistakable boomerang-shaped skull formed by long sideways-projecting bones, while the rest of the body was flattened and equipped for swimming close to the bottom.

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Carnivore Late Carboniferous and Early Permian rivers, ponds, floodplain wetlands, muddy lake bottoms, seasonal waterways, and freshwater habitats of North America North America 🦕 Diplodocus

Diplodocus Facts for Kids

Diplodocus was a giant plant-eating sauropod dinosaur with a long neck, very long tail, small head, and four sturdy legs. It lived during the Late Jurassic Period in western North America and became famous for one of the longest dinosaur body shapes ever studied.

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Herbivore Jurassic floodplains and open woodland edges North America 🦣 Diprotodon

Diprotodon Facts for Kids

Diprotodon was the largest known marsupial and one of the giants of Pleistocene Australia. It was a plant-eating vombatiform related more closely to wombats and koalas than to rhinoceroses or hippopotamuses. A barrel-shaped body, pillar-like limbs, enormous lower incisors, ridged molars, and a surprisingly hollow but strong skull helped this multi-tonne herbivore travel widely and process tough vegetation.

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Herbivore Pleistocene woodlands, grasslands, shrublands, river valleys, lake margins, dry plains, and seasonally variable habitats across mainland Australia Australia 🐺 Dire Wolf

Dire Wolf Facts for Kids

The dire wolf was an extinct Ice Age predator from the Americas. It looked wolf-like, but new research shows it was not just a bigger gray wolf. Dire wolves had strong jaws, powerful teeth, and many fossils at La Brea Tar Pits, where they are one of the most famous Ice Age mammals.

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Carnivore Ice Age grasslands, woodlands, scrublands, open plains, valleys, and tar pit regions North America, South America 🐦 Dodo

Dodo Facts for Kids

The dodo was a flightless bird that lived only on Mauritius, an island in the Indian Ocean. It was not a dinosaur and not a silly bird. The dodo was related to pigeons and doves, lived in island forests, and went extinct in the 1600s after people and introduced animals changed its world.

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Omnivore Island forests, coastal woodlands, lowland habitats, and forest floors on Mauritius Africa 🛡️ Doedicurus

Doedicurus Facts for Kids

Doedicurus was a giant armored mammal from South America. It was not a dinosaur, and it was not an ankylosaur, even though its heavy tail club can look a little dinosaur-like. Doedicurus was a glyptodont, an extinct armadillo relative with a huge shell and a powerful clubbed tail.

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Herbivore Ice Age grasslands, savannas, open plains, scrublands, lowlands, and river valleys South America 🐋 Dorudon

Dorudon Facts for Kids

Dorudon was an ancient whale from the Eocene seas. It was not a dinosaur, fish, or modern dolphin. This basilosaurid whale had a streamlined body, sharp teeth, small hind limbs, and swam through warm oceans such as the ancient Tethys Sea, where it lived alongside the much larger Basilosaurus.

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Carnivore Eocene Tethys Sea waters, Wadi Al-Hitan marine habitats, warm shallow seas, coastal lagoons, open ocean feeding zones, Egyptian marine deposits, Pakistan fossil areas, and ancient whale ecosystems Africa, Asia, North America, Oceania 🦕 Dreadnoughtus

Dreadnoughtus Facts for Kids

Dreadnoughtus was a gigantic plant-eating titanosaur from Late Cretaceous Patagonia. It had a long neck, long tail, huge body, and four strong legs. Its fossil skeleton is unusually complete for such a massive dinosaur, helping scientists study giant sauropods in more detail.

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Herbivore Cretaceous floodplains, river plains, and open woodland edges South America 🪽 Dsungaripterus

Dsungaripterus Facts for Kids

Dsungaripterus was a pterosaur from Early Cretaceous Asia. It was not a dinosaur, but a flying reptile with an upturned beak, a head crest, strong jaws, and blunt back teeth. Scientists think it was well suited for eating hard-shelled prey such as shellfish.

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Carnivore Early Cretaceous ponds, lakes, coastal flats, and rocky shorelines Asia 🐟 Dunkleosteus

Dunkleosteus Facts for Kids

Dunkleosteus was a giant armored fish from the Late Devonian Period. It was not a dinosaur, shark, or marine reptile, but a placoderm with a heavy armored head and sharp bony jaw plates. This prehistoric predator lived long before dinosaurs appeared.

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Carnivore Devonian oceans, shallow seas, reefs, and open marine waters North America, Europe, Africa 🦘 Eastern Hare-Wallaby

Eastern Hare-Wallaby Facts for Kids

The Eastern Hare-Wallaby was a small extinct wallaby from southeastern Australia. It was not a hare or a rabbit, even though it could bound away with speedy, hare-like jumps. This shy nocturnal marsupial rested in tussocks and saltbush by day, then came out at night in grasslands and open country.

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Herbivore Southeastern Australian grasslands, open plains, saltbush country, tussock shelter, shrublands, dry woodlands, and ground resting seats Oceania 🦎 Edaphosaurus

Edaphosaurus Facts for Kids

Edaphosaurus was a sail-backed plant-eating synapsid that lived from the Late Carboniferous into the Early Permian. It was not a dinosaur and was more closely related to mammals than to reptiles such as lizards. A tiny head, broad rib cage, specialised tooth plates, and a tall sail supported by crossbarred neural spines made it one of the strangest early land herbivores.

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Herbivore Late Carboniferous and Early Permian floodplains, river margins, seasonal wetlands, wooded lowlands, and plant-rich terrestrial habitats North America 🦈 Edestus

Edestus Facts for Kids

Edestus was a large cartilaginous fish that hunted in coastal seas and estuaries during the Late Carboniferous. It is often nicknamed the scissor-tooth shark, but it belonged to an ancient branch closer to chimaeras than to modern sharks. Curved tooth whorls in both jaws carried rows of sharp teeth that sliced through prey in a motion unlike any living fish.

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Carnivore Late Carboniferous coastal seas, estuaries, shallow marine waters, river mouths, warm continental shelves, and nearshore hunting grounds North America, Europe, Asia 🦕 Edmontosaurus

Edmontosaurus Facts for Kids

Edmontosaurus was a large duck-billed plant-eating dinosaur from Late Cretaceous North America. It had a broad beak, many chewing teeth, strong legs, and a long tail. Some fossils even preserve skin impressions, giving scientists rare clues about what this dinosaur looked like.

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Herbivore Cretaceous floodplains, forests, river plains, and coastal plains North America 🦕 Einiosaurus

Einiosaurus Facts for Kids

Einiosaurus was a horned dinosaur from Late Cretaceous Montana. It was not Triceratops, but it was a centrosaurine ceratopsid with a very unusual nose horn that curved forward and downward. Fossils from the Two Medicine Formation suggest Einiosaurus lived in groups, giving scientists rare clues about horned dinosaur growth and herd life.

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Herbivore Late Cretaceous northwestern Montana floodplains, Two Medicine Formation habitats, river valleys, seasonal plains, forest edges, nesting regions, low vegetation zones, and centrosaurine herd ecosystems North America 🌊 Elasmosaurus

Elasmosaurus Facts for Kids

Elasmosaurus was a long-necked marine reptile from the Late Cretaceous Period. It was not a dinosaur, but a plesiosaur with a tiny head, many neck bones, a broad body, and four flippers. It lived in ancient seas that once covered parts of North America.

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Carnivore Late Cretaceous shallow seas, seaways, coastal waters, and open marine habitats North America 🦏 Elasmotherium

Elasmotherium Facts for Kids

Elasmotherium was a giant extinct rhinoceros relative from Ice Age Eurasia. It was not a dinosaur and not a horse, even though its nickname, the Siberian unicorn, sounds magical. Scientists think it lived on open grasslands and may have survived until less than 40,000 years ago.

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Herbivore Ice Age steppe grasslands, open plains, dry shrublands, river valleys, and cold Eurasian habitats Europe, Asia 🐦 Elephant Bird

Elephant Bird Facts for Kids

Elephant birds were giant extinct flightless birds from Madagascar. They were not dinosaurs, and they were not elephants, despite their name. These huge birds lived in island habitats, ate plants, laid the largest known bird eggs, and disappeared after humans changed Madagascar's ecosystems.

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Herbivore Madagascar forests, grasslands, shrublands, wetlands, coastal habitats, and island lowlands Africa 🦏 Embolotherium

Embolotherium Facts for Kids

Embolotherium was a gigantic brontothere that lived in Mongolia during the Late Eocene. It was an odd-toed hoofed mammal related to the broader group containing rhinos, horses, and tapirs, but it was not a true rhinoceros. Its most remarkable feature was a long battering-ram-shaped structure formed from the nasal and frontal bones. The structure was hollow and connected with an enlarged nasal cavity, so scientists think it may have helped produce or amplify sounds rather than serving as a weapon.

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Herbivore Late Eocene semi-arid floodplains, open woodlands, river valleys, shrublands, and dry continental plains of Mongolia and central Asia Asia 🦦 Enhydriodon

Enhydriodon Facts for Kids

Enhydriodon was a genus of giant prehistoric otters that lived in Africa and Asia. The largest known species, Enhydriodon omoensis, inhabited the Lower Omo Valley of Ethiopia between about 3.4 and 2.5 million years ago. It may have weighed around 200 kilograms or more and probably spent much more time on land than living otters, using broad rounded teeth to crush a varied diet of aquatic and terrestrial prey.

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Carnivore Late Miocene to Early Pleistocene river valleys, lake margins, wooded grasslands, floodplains, wetlands, and nearby terrestrial habitats across Africa and southern Asia Africa, Asia 🐗 Entelodon

Entelodon Facts for Kids

Entelodon was a large extinct hoofed mammal from the Paleogene. It was not a dinosaur and not a true pig, even though entelodonts are often nicknamed hell pigs. Entelodon had a huge head, powerful teeth, long legs, and probably ate a mix of meat, plants, carrion, roots, and other tough foods.

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Omnivore Oligocene European and Asian open woodlands, floodplains, grassland edges, forest margins, river valleys, dry plains, scavenging areas, and hoofed mammal habitats Europe, Asia 🐴 Eohippus

Eohippus Facts for Kids

Eohippus is the popular name for Hyracotherium, a tiny early horse relative from the Eocene. It was not a dinosaur and not a modern horse. This small forest browser had a short face, low-crowned teeth, four toes on each front foot, three toes on each back foot, and helped scientists understand the early story of horse evolution.

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Herbivore Eocene North American and European forests, warm woodlands, leafy understory habitats, river margins, floodplains, forest floors, browsing areas, and early horse ecosystems North America, Europe 🦖 Eoraptor

Eoraptor Facts for Kids

Eoraptor was one of the earliest known dinosaurs from Late Triassic Argentina. It was not a giant like T. rex and not a true bird ancestor with feathers. This small, quick dinosaur lived in the Ischigualasto Formation, where early dinosaurs shared the world with many other reptiles and mammal relatives.

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Omnivore Late Triassic Argentine floodplains, Ischigualasto Formation habitats, Valley of the Moon river systems, warm seasonal forests, fern-rich ground cover, conifer woodlands, volcanic landscapes, and early dinosaur ecosystems South America 🦕 Eotriceratops

Eotriceratops Facts for Kids

Eotriceratops was a huge horned dinosaur from Late Cretaceous Alberta. It was not exactly Triceratops, but it was a close relative and may have been near the early part of the Triceratops group. Its name means dawn three-horned face, and its fossils were found at Dry Island Buffalo Jump Provincial Park.

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Herbivore Late Cretaceous Alberta floodplains, Horseshoe Canyon Formation habitats, Dry Island Buffalo Jump fossil area, river channels, forest edges, coastal plain lowlands, low vegetation zones, and Triceratops-group ecosystems North America 🐕 Epicyon

Epicyon Facts for Kids

Epicyon was a giant bone-crushing dog that lived in North America during the Late Miocene and Early Pliocene. It was a true member of the dog family but was not a wolf, hyena, or direct ancestor of modern dogs. A broad skull, enlarged jaw muscles, strong premolars, and a massive body allowed the largest species to process flesh, hide, and bone.

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Carnivore Late Miocene and Early Pliocene grasslands, wooded plains, river valleys, open scrub, prairie habitats, and mixed terrestrial environments North America 🐊 Eryops

Eryops Facts for Kids

Eryops was a large, sturdy temnospondyl that lived in what is now the southern United States during the Early Permian. It was not a dinosaur. Its broad skull carried many pointed teeth and large fangs on the palate, while heavily built limbs and strong muscle attachments allowed it to support itself on land better than many more aquatic temnospondyls.

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Carnivore Early Permian rivers, floodplains, ponds, seasonal wetlands, muddy shorelines, wooded lowlands, and semi-aquatic habitats of the southern United States North America 👑 Estemmenosuchus

Estemmenosuchus Facts for Kids

Estemmenosuchus was a large, heavily built dinocephalian therapsid from Middle Permian Russia. It was not a crocodile, dinosaur, or mammal. Its massive skull carried extraordinary bony projections above the eyes and along the cheeks, creating a crown-like outline. A deep barrel-shaped body and reduced back teeth suggest that it mainly ate plants, although occasional omnivory remains possible.

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Herbivore Middle Permian river channels, flood deposits, wooded lowlands, seasonal plains, and terrestrial habitats near the ancient Ural region Europe, Asia 🦕 Euoplocephalus

Euoplocephalus Facts for Kids

Euoplocephalus was an armored ankylosaurid dinosaur from Late Cretaceous North America. It was not a meat-eater and not Ankylosaurus, though it belonged to the same armored dinosaur family. Euoplocephalus had bony plates, body armor, a wide skull, a tail club, and even small bony eyelid armor that could help protect its eyes.

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Herbivore Late Cretaceous Alberta floodplains, Dinosaur Park Formation habitats, river channels, coastal plain lowlands, forest edges, fern-rich ground cover, low browsing zones, and ankylosaurid armored dinosaur ecosystems North America 🦂 Eurypterid

Eurypterid Facts for Kids

Eurypterids were extinct aquatic arthropods often nicknamed sea scorpions. They were not true scorpions, dinosaurs, fish, or reptiles, but relatives of the chelicerate group that includes spiders, scorpions, and horseshoe crabs. Some eurypterids were small, while a few giant species became some of the largest arthropods ever.

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Carnivore Paleozoic seas, brackish waters, freshwater habitats, muddy bottoms, and coastal waterways Worldwide 🐺 Falkland Islands Wolf

Falkland Islands Wolf Facts for Kids

The Falkland Islands Wolf, also called the warrah, was a recently extinct canid that lived only on the Falkland Islands in the South Atlantic. It was not a true wolf and not a fox, though it looked dog-like. It was the only native land mammal of the Falkland Islands and became extinct in 1876.

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Carnivore Falkland Islands grasslands, rocky coasts, beaches, tussock habitats, shorelines, seabird areas, and windy island plains South America 🦖 Fukuiraptor

Fukuiraptor Facts for Kids

Fukuiraptor was a meat-eating dinosaur from Early Cretaceous Japan. It was not T. rex, but it was an important Japanese theropod and is often discussed with megaraptorans or allosauroid relatives. The Fukui Prefectural Dinosaur Museum says Fukuiraptor was about 4.2 metres long, had relatively long hands, and carried large thin hand claws.

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Carnivore Early Cretaceous Japanese river floodplains, Kitadani Formation habitats, Fukui forested lowlands, freshwater channels, wet seasonal plains, small prey habitats, fossil bonebeds, and East Asian predator ecosystems Asia 🦕 Fukuisaurus

Fukuisaurus Facts for Kids

Fukuisaurus was a plant-eating dinosaur from Early Cretaceous Japan. It was an iguanodontian ornithopod, related to dinosaurs such as Iguanodon and Altirhinus. Fukuisaurus was described from well-preserved skull material found at Katsuyama in Fukui Prefecture, and it helped show how rich Japan’s Kitadani dinosaur ecosystem was.

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Herbivore Early Cretaceous Japanese floodplains, Kitadani Formation habitats, Fukui river systems, forested lowlands, fern-rich ground cover, conifer woodlands, wet seasonal plains, and iguanodontian browsing ecosystems Asia 🦕 Gallimimus

Gallimimus Facts for Kids

Gallimimus was a long-legged theropod dinosaur from Late Cretaceous Mongolia. It looked a bit like an ostrich, with a small head, long neck, long tail, and powerful legs. Scientists think it was a fast-moving dinosaur that may have eaten a mixed diet.

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Omnivore Cretaceous desert plains, river areas, and open habitats Asia 🐦 Gastornis

Gastornis Facts for Kids

Gastornis was a giant extinct flightless bird from the Paleogene. It was not a dinosaur and not a South American terror bird, even though older books sometimes painted it as a scary hunter. Newer evidence suggests Gastornis was probably a plant eater with a huge beak built for tough seeds and vegetation.

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Herbivore Paleogene European forests, warm woodlands, swampy forest edges, river floodplains, subtropical lowlands, fossil track sites, and ancient plant-rich habitats Europe, North America, Asia 🐦 Genyornis

Genyornis Facts for Kids

Genyornis was a giant extinct flightless bird from Pleistocene Australia. It was not a dinosaur and not an emu, though it lived in the same country as modern emus. Genyornis newtoni was the last known mihirung, or thunder bird, and may have stood over 2 metres tall before disappearing around 45,000 to 50,000 years ago.

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Herbivore Pleistocene Australian wetlands, lake margins, river edges, open woodlands, shrublands, grassy plains, reed beds, and megafauna habitats Oceania 🦥 Giant Ground Sloth

Giant Ground Sloth Facts for Kids

Giant ground sloths were extinct mammals related to modern sloths. They were not dinosaurs, and they did not live in trees like today’s small sloths. Different kinds lived in North and South America, from forest browsers such as Megalonyx to enormous South American forms such as Megatherium.

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Herbivore Ice Age forests, woodlands, grasslands, shrublands, caves, river valleys, and open plains North America, South America 🦖 Giganotosaurus

Giganotosaurus Facts for Kids

Giganotosaurus was a giant meat-eating dinosaur from Late Cretaceous South America. It had a huge skull, sharp blade-like teeth, strong legs, and a long tail for balance, making it one of the largest land predators known from dinosaur fossils.

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Carnivore Cretaceous floodplains, forests, and river plains South America 🦧 Gigantopithecus

Gigantopithecus Facts for Kids

Gigantopithecus was a giant extinct ape from Pleistocene southern China. It was not a dinosaur, gorilla, or Bigfoot, though it may have been the largest primate ever known. Scientists mostly know it from jaws and thousands of teeth, so its full body is reconstructed carefully from clues rather than a complete skeleton.

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Herbivore Pleistocene southern Chinese subtropical forests, karst cave regions, Guangxi forest mosaics, seasonal woodland habitats, fruiting forest patches, river valleys, limestone landscapes, and changing Ice Age ecosystems Asia 🪽 Gigantoraptor

Gigantoraptor Facts for Kids

Gigantoraptor was a huge bird-like dinosaur from Late Cretaceous Inner Mongolia, China. It was not a raptor like Velociraptor, despite its name. Gigantoraptor was an oviraptorosaur, a group usually known for smaller feathered dinosaurs, but this one grew around 8 metres long and weighed about 1.4 to 2 tonnes.

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Omnivore Late Cretaceous Inner Mongolian floodplains, Iren Dabasu Formation habitats, semi-arid river systems, open woodlands, sandy channels, nesting areas, mixed plant and small animal ecosystems, and giant oviraptorosaur habitats Asia 🦥 Glossotherium

Glossotherium Facts for Kids

Glossotherium was a giant ground sloth that lived across South America during the Pliocene and Pleistocene. Unlike modern tree sloths, it walked on the ground and grew to the size of a small car. Its broad muzzle gathered large mouthfuls of grasses and herbs, while massive forelimbs and curved claws made it a powerful digger capable of excavating enormous burrows.

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Herbivore Pliocene and Pleistocene grasslands, open savannas, dry scrub, river floodplains, cave regions, and burrow-rich plains across South America South America 🛡️ Glyptodon

Glyptodon Facts for Kids

Glyptodon was a giant armored mammal from South America. It was not a dinosaur, and it was not a turtle, even though its huge bony shell can make people think of one. Glyptodon was a glyptodont, a large extinct armadillo relative with a domed carapace made from many bony plates.

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Herbivore Ice Age grasslands, open plains, savannas, scrublands, river valleys, and lowland habitats South America 🐅 Gorgonops

Gorgonops Facts for Kids

Gorgonops was a saber-toothed gorgonopsian therapsid that hunted in what is now South Africa during the Late Permian. It was not a dinosaur or a mammal, but it belonged to the synapsid branch that later produced mammals. A long skull, enlarged upper canines, sharp incisors, and strong land-going limbs made it a dangerous medium-sized predator.

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Carnivore Late Permian river floodplains, seasonal dry plains, wooded lowlands, scrubby valleys, and terrestrial habitats of the South African Karoo Africa 🐧 Great Auk

Great Auk Facts for Kids

The great auk was a flightless seabird from the North Atlantic. It was not a penguin and not a dinosaur, even though it looked a bit penguin-like. Great auks were excellent swimmers, nested on rocky islands, and were driven to extinction by heavy hunting in the 1800s.

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Carnivore North Atlantic rocky islands, cold coastal waters, cliffs, breeding colonies, and open ocean North America, Europe 🦅 Guadalupe Caracara

Guadalupe Caracara Facts for Kids

The Guadalupe Caracara was a recently extinct bird of prey from Guadalupe Island off Mexico. It was not a dinosaur, hawk, or eagle, but a caracara in the falcon family. This bold island raptor was hunted and poisoned by people, and it vanished in the early 1900s.

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Carnivore Guadalupe Island cliffs, scrublands, rocky slopes, coastal areas, open island habitats, nesting sites, and Pacific island terrain North America 🦅 Haast's Eagle

Haast's Eagle Facts for Kids

Haast's Eagle was a giant extinct eagle from New Zealand. It was not a dinosaur, but one of the largest eagles ever known. This powerful bird hunted moa in South Island forests and became extinct after moa disappeared and New Zealand's ecosystems changed after people arrived.

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Carnivore New Zealand forests, mountain valleys, scrublands, open woodland edges, and South Island habitats Oceania 🪱 Hallucigenia

Hallucigenia Facts for Kids

Hallucigenia was a tiny spiky animal from the Cambrian Period. It was not a dinosaur, fish, or reptile, but an extinct worm-like animal related to velvet worm relatives. Hallucigenia became famous because early scientists were not sure which side was up, which end was the head, or how its strange body worked.

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Carnivore Cambrian seafloors, sponge communities, shallow seas, and muddy ocean habitats North America, Asia 🐦 Hawaiian Rail

Hawaiian Rail Facts for Kids

The Hawaiian Rail, also called the Hawaiian Crake or Hawaiian Spotted Rail, was an extinct small rail from the island of Hawaiʻi. It was not a dinosaur and not a seabird. This shy ground bird lived in grasslands, marshy places, and forest-floor habitats before introduced predators and habitat changes helped drive it extinct.

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Omnivore Hawaiʻi Island grasslands, marshy areas, dense ground cover, forest floors, wet meadows, lowland habitats, and island vegetation edges Oceania 🐔 Heath Hen

Heath Hen Facts for Kids

The Heath Hen was a recently extinct bird from the eastern United States. It was not a dinosaur, but a grouse and close relative of prairie chickens. Heath Hens once lived in open barrens, scrublands, and grasslands, but the final known bird, Booming Ben, disappeared on Martha's Vineyard in 1932.

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Omnivore Eastern North American barrens, heathlands, grasslands, scrublands, coastal plains, and Martha's Vineyard habitats North America 🐟 Helicoprion

Helicoprion Facts for Kids

Helicoprion was a strange shark-like cartilaginous fish from the Permian Period. It was not a dinosaur or true modern shark, but a prehistoric relative of chimaeras with a famous spiral tooth whorl in its lower jaw. That tooth spiral puzzled scientists for many years.

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Carnivore Permian oceans, continental seas, and open marine waters North America, Asia, Australia 🐢 Henodus

Henodus Facts for Kids

Henodus was a small, heavily armoured placodont that lived in Late Triassic Germany. It was not a turtle, although its broad flat shell and short boxy head made it look remarkably turtle-like. Henodus had only four functional crushing teeth, beak-like jaw edges, and an unusual feeding system that may have handled tiny crustaceans, snails, algae, and other soft or small foods.

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Omnivore Late Triassic brackish lagoons, shallow lakes, quiet coastal basins, muddy bottoms, algae-rich shallows, and restricted waterways of ancient Germany Europe 🦖 Herrerasaurus

Herrerasaurus Facts for Kids

Herrerasaurus was one of the earliest known dinosaurs, living in Late Triassic Argentina long before T. rex. It was not a giant Jurassic monster, but a fast, sharp-toothed predator from a time when dinosaurs were still rare. Fossils from the Ischigualasto Formation help scientists study how the first dinosaurs began to take shape.

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Carnivore Late Triassic Argentine floodplains, Ischigualasto Formation forests, warm seasonal river valleys, volcanic landscapes, fern and horsetail ground cover, conifer woodlands, early dinosaur habitats, and Triassic reptile ecosystems South America 🐕 Hesperocyon

Hesperocyon Facts for Kids

Hesperocyon was one of the earliest well-known members of the dog family. It lived in North America from the Late Eocene into the Oligocene, long before wolves, foxes, or domestic dogs appeared. Although its teeth and ear region reveal a true canid, its long flexible body, low limbs, plantigrade feet, and possible climbing ability made it look more like a civet or small mongoose than a modern dog.

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Omnivore Late Eocene and Oligocene forests, open woodlands, river floodplains, shrublands, and increasingly seasonal plains of North America North America 🐦 Hesperornis

Hesperornis Facts for Kids

Hesperornis was an extinct toothed bird from the Late Cretaceous seas of North America. It was not a dinosaur in the everyday “T. rex” sense, but birds are part of the dinosaur family tree. Hesperornis could not fly, had tiny wings, used powerful legs and feet for diving, and chased fish in the Western Interior Seaway.

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Carnivore Late Cretaceous Western Interior Seaway, shallow inland seas, Kansas chalk seas, marine diving habitats, fish-rich waters, coastal nesting areas, and predator-rich Cretaceous seaways North America 🐱 Homotherium

Homotherium Facts for Kids

Homotherium was an extinct scimitar-toothed cat that lived in parts of Africa, Eurasia, and the Americas. It was not a dinosaur and not the same as Smilodon. Homotherium had shorter, flatter saber teeth, long legs, and a body that may have been better for moving through open habitats.

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Carnivore Ice Age grasslands, open plains, savannas, steppe habitats, open woodlands, and cold valleys Africa, Europe, Asia, North America 🐺 Hyaenodon

Hyaenodon Facts for Kids

Hyaenodon was an extinct meat-eating mammal from the group Hyaenodonta. It was not a dinosaur and not a true hyena, even though its name means hyena tooth. Different Hyaenodon species lived across North America and Eurasia for millions of years, using sharp slicing teeth to eat meat.

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Carnivore Eocene to Miocene North American and Eurasian open woodlands, plains, floodplains, river valleys, forest edges, dry basins, fossil badlands, and predator habitats North America, Europe, Asia 🦕 Hypsilophodon

Hypsilophodon Facts for Kids

Hypsilophodon was a small, agile plant-eating dinosaur from Early Cretaceous England. Scientists once thought it climbed trees, but the Natural History Museum explains that this came from a misunderstanding of its toe bones. Today, Hypsilophodon is seen as a fast ground runner that may have lived in groups.

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Herbivore Early Cretaceous Isle of Wight floodplains, Wessex Formation habitats, forested river systems, fern-rich ground cover, coastal lowlands, pond margins, seasonal mudstone beds, and small herbivore ecosystems Europe 🦏 Hyracodon

Hyracodon Facts for Kids

Hyracodon was a lightly built rhinocerotoid that lived in North America from the Late Eocene into the Oligocene. It was not a horse or a modern rhinoceros. Unlike today’s heavy rhinos, it had no horn, carried a relatively small skull on a longer neck, and walked on long slender legs. Its horse-like proportions earned members of its family the nickname running rhinos, although fossils cannot tell us exactly how fast Hyracodon could run.

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Herbivore Late Eocene and Oligocene open woodlands, shrublands, river floodplains, dry plains, wooded grasslands, and badland-forming environments of western North America North America 🐦 Ichthyornis

Ichthyornis Facts for Kids

Ichthyornis was an extinct toothed bird from the Late Cretaceous seas of North America. It was not a pterosaur and not a modern gull, though it probably lived a seabird-like life. This flying bird had sharp teeth in its jaws, a small beak at the tip, strong wings, and hunted over the Western Interior Seaway.

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Carnivore Late Cretaceous Western Interior Seaway, Kansas chalk seas, North American coastal waters, shallow inland seas, fish-rich marine habitats, shorelines, nesting areas, and Cretaceous seaways North America 🌊 Ichthyosaurus

Ichthyosaurus Facts for Kids

Ichthyosaurus was a fish-shaped marine reptile from the Early Jurassic Period. It was not a dinosaur, but an ocean-living reptile with a streamlined body, flippers, sharp teeth, and large eyes. Fossils from Europe help scientists study how some reptiles became fast swimmers in ancient seas.

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Carnivore Jurassic shallow seas, coastal waters, lagoons, and open marine habitats Europe 🦕 Iguanodon

Iguanodon Facts for Kids

Iguanodon was a large plant-eating dinosaur with a beak, strong back legs, useful front limbs, and famous thumb spikes. It lived during the Early Cretaceous Period and was one of the first dinosaurs ever named by scientists.

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Herbivore Cretaceous forests, floodplains, and coastal plains Europe 🐅 Inostrancevia

Inostrancevia Facts for Kids

Inostrancevia was a giant saber-toothed gorgonopsian that lived near the end of the Permian Period. It was not a dinosaur or a mammal, but it belonged to the therapsid branch of the synapsid family tree. A long skull, enormous canine teeth, a wide-opening mouth, and a robust body made it one of the largest land predators of its time.

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Carnivore Latest Permian river floodplains, seasonal dry plains, wooded lowlands, semi-arid basins, and terrestrial habitats across northern and southern Pangaea Europe, Africa 🦌 Irish Elk

Irish Elk Facts for Kids

The Irish elk was a giant extinct deer from the Ice Age. It was not a dinosaur, and despite its name, it was not a true elk like the North American elk. Male Irish elk are famous for enormous antlers that could spread wider than a small car.

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Herbivore Ice Age grasslands, open woodlands, steppe-woodlands, river valleys, and shrublands Europe, Asia 🪽 Istiodactylus

Istiodactylus Facts for Kids

Istiodactylus was a large pterosaur from the Early Cretaceous of England. It was not a dinosaur. Its short, broad snout carried tightly packed, blade-like teeth that formed a slicing edge near the front of the jaws. Many scientists think this unusual mouth was better for cutting flesh from carcasses than for catching slippery fish.

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Carnivore Early Cretaceous river floodplains, coastal lagoons, tidal flats, wooded lowlands, freshwater channels, and semi-arid landscapes of the Isle of Wight Europe 🦭 Japanese Sea Lion

Japanese Sea Lion Facts for Kids

The Japanese Sea Lion was a recently extinct marine mammal from the western North Pacific. It was not a dinosaur or true seal, but an eared seal related to California sea lions. It lived around Japan, Korea, and nearby coasts, formed breeding colonies, and disappeared after heavy hunting and other human pressures.

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Carnivore Western North Pacific rocky islands, sandy beaches, coastal waters, breeding rookeries, Sea of Japan coasts, Korean Peninsula shores, and Japanese archipelago habitats Asia 🐅 Javan Tiger

Javan Tiger Facts for Kids

The Javan Tiger was a tiger population from the Indonesian island of Java. It was not a dinosaur, and it was not the same as the Sumatran tiger still living today. It was officially treated as extinct after no confirmed evidence was found, though a disputed 2019 hair sample has kept the mystery door slightly open.

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Carnivore Java forests, montane forests, tropical woodlands, rugged reserves, river valleys, plantation edges, and Meru Betiri habitats Asia 🐹 Josephoartigasia

Josephoartigasia Facts for Kids

Josephoartigasia was a gigantic plant-eating rodent that lived in what is now Uruguay during the Pliocene. The best-known species, Josephoartigasia monesi, is represented by an enormous skull about 53 centimetres long. It may have weighed around 480 to 500 kilograms according to a recent estimate, although older studies proposed much larger masses. Its huge continuously growing incisors could deliver a powerful bite and may also have worked like tusks for digging, cutting plants, or defense.

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Herbivore Pliocene estuaries, coastal woodlands, river margins, wetlands, forest edges, and plant-rich lowlands of Uruguay South America 🐊 Kaprosuchus

Kaprosuchus Facts for Kids

Kaprosuchus was an extinct crocodyliform from Late Cretaceous Niger. It was not a dinosaur and not a modern crocodile. Its nickname BoarCroc came from huge tusk-like teeth that stuck upward and downward from its jaws, making it one of the toothiest little terrors in the prehistoric crocodile family album.

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Carnivore Late Cretaceous Niger floodplains, desert river edges, sandy channels, scrubby drylands, seasonal waterways, land-hunting areas, and Saharan crocodyliform habitats Africa 🐦 Kauaʻi ʻŌʻō

Kauaʻi ʻŌʻō Facts for Kids

The Kauaʻi ʻŌʻō was a recently extinct songbird that lived only on the Hawaiian island of Kauaʻi. It was not a dinosaur, and it was not a parrot. This small dark bird belonged to a lost Hawaiian honeyeater family, fed on nectar and insects, and is famous for the haunting recording of the last known male calling with no mate answering.

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Omnivore Hawaiian wet forests, montane forests, stream valleys, native tree cavities, Alakaʻi Wilderness areas, and Kauaʻi island habitats Oceania 🐦 Kelenken

Kelenken Facts for Kids

Kelenken was a giant extinct terror bird from Miocene Patagonia in Argentina. It was not a dinosaur and not a modern ostrich. Kelenken guillermoi is famous for having the largest known skull of any bird, with a huge hooked beak built for a powerful predatory lifestyle.

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Carnivore Middle Miocene Patagonian grasslands, open woodlands, shrublands, dry plains, Comallo fossil sites, Collón Curá Formation habitats, and South American predator ecosystems South America 🦕 Kentrosaurus

Kentrosaurus Facts for Kids

Kentrosaurus was a plant-eating stegosaur from Late Jurassic Tanzania. It was related to Stegosaurus, but it was smaller and much spikier. Instead of carrying only broad plates, Kentrosaurus had small plates along its front body that changed into long sharp spikes over its hips and tail, plus a shoulder spike on each side.

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Herbivore Late Jurassic Tanzanian floodplains, Tendaguru Formation coastal lowlands, vegetated inland habitats, lagoon margins, tidal flats, conifer-dominated areas, seasonal subtropical environments, and African stegosaur ecosystems Africa 🦕 Kosmoceratops

Kosmoceratops Facts for Kids

Kosmoceratops was a spectacular horned dinosaur from Late Cretaceous Utah. It was not Triceratops, but it belonged to the same big ceratopsian family. Kosmoceratops is famous for having one of the most decorated dinosaur skulls ever found, with horns over the eyes, on the nose and cheeks, and a frill covered in curling spikes.

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Herbivore Late Cretaceous southern Utah floodplains, Kaiparowits Formation habitats, Grand Staircase-Escalante wetlands, coastal plain forests, river channels, low vegetation zones, and southern Laramidian ceratopsian ecosystems North America 🦕 Kritosaurus

Kritosaurus Facts for Kids

Kritosaurus was a large duck-billed dinosaur from Late Cretaceous North America. It was not a meat-eater and not a crested lambeosaur like Parasaurolophus. Kritosaurus is famous partly because its type skull is incomplete, especially around the snout, so scientists have debated exactly how its nose and crest looked.

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Herbivore Late Cretaceous New Mexico floodplains, San Juan Basin habitats, Kirtland and Ojo Alamo region ecosystems, river channels, coastal plain lowlands, forest edges, fern and flowering plant zones, and hadrosaur browsing habitats North America 🌊 Kronosaurus

Kronosaurus Facts for Kids

Kronosaurus was a giant marine reptile predator from the Early Cretaceous Period. It was not a dinosaur, but a short-necked pliosaur with a massive head, powerful jaws, sharp teeth, four flippers, and fossils famous from Australia. It hunted in ancient oceans and inland seas.

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Carnivore Early Cretaceous inland seas, shallow seas, coastal waters, and open marine habitats Australia, South America 🦆 Labrador Duck

Labrador Duck Facts for Kids

The Labrador Duck was a recently extinct sea duck from the western North Atlantic. It was not a dinosaur, and it was not a Labrador dog. This rare duck lived along cold Atlantic coasts, likely ate shellfish, and disappeared in the late 1800s before scientists could learn everything about it.

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Carnivore North Atlantic coasts, bays, inlets, sandy shores, rocky beaches, and cold marine waters North America 🦘 Lake Mackay Hare-Wallaby

Lake Mackay Hare-Wallaby Facts for Kids

The Lake Mackay Hare-Wallaby, also called the Central Hare-Wallaby or kuluwarri, was a recently extinct Australian marsupial. It was not a rabbit or a true kangaroo, but a small hare-wallaby known from one preserved skull and Aboriginal knowledge. It lived in central desert country around Lake Mackay, spinifex, sand plains, and dunes.

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Herbivore Central Australian deserts, Lake Mackay sand plains, spinifex dunes, sandy clay soils, mulga shrublands, shallow nest sites, desert grasslands, and arid shelter habitats Oceania 🦕 Lambeosaurus

Lambeosaurus Facts for Kids

Lambeosaurus was a crested duck-billed dinosaur from Late Cretaceous western North America. It was not Parasaurolophus, although both were lambeosaurine hadrosaurs with hollow head crests. Lambeosaurus had a hatchet-shaped crest with long nasal passages inside, a duck-like beak, grinding teeth, and a plant-eating lifestyle.

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Herbivore Late Cretaceous Alberta floodplains, Dinosaur Park Formation habitats, western North American river valleys, coastal plain forests, swampy lowlands, fern and flowering plant zones, herd movement routes, and crested hadrosaur ecosystems North America 🦉 Laughing Owl

Laughing Owl Facts for Kids

The Laughing Owl, also called whēkau, was a recently extinct owl from New Zealand. It was not a dinosaur, and it did not really laugh like a person, though its strange calls gave it the name. This long-legged owl hunted at night, nested around rocks and bluffs, and disappeared in the early 1900s.

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Carnivore New Zealand rocky outcrops, caves, bluffs, dry shrublands, forests, grasslands, river valleys, and South Island habitats Oceania 🐦 Laysan Rail

Laysan Rail Facts for Kids

The Laysan Rail was a tiny flightless bird from Laysan Island in the Northwestern Hawaiian Islands. It was not a dinosaur and not a chicken, but a rail. Rabbits destroyed much of its home on Laysan, and a rescue population on Midway later vanished after rats arrived during World War II.

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Omnivore Laysan Island vegetation, Hawaiian island scrub, seabird colony edges, ground cover, Midway Atoll habitats, sandy flats, and Northwestern Hawaiian island habitats Oceania 🦕 Leaellynasaura

Leaellynasaura Facts for Kids

Leaellynasaura was a small plant-eating dinosaur from Early Cretaceous Victoria, Australia. It was not a meat-eater and not a giant sauropod, but a tiny ornithischian from a polar world. When it lived, southern Australia sat much closer to Antarctica, so Leaellynasaura may have faced long winter darkness in forests far warmer than Antarctica today.

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Herbivore Early Cretaceous Victorian polar forests, Dinosaur Cove habitats, Eumeralla Formation river systems, high-latitude woodlands, fern-rich ground cover, horsetail patches, long winter darkness zones, and Australian dinosaur ecosystems Australia 🐟 Leedsichthys

Leedsichthys Facts for Kids

Leedsichthys was a gigantic prehistoric fish from the Jurassic Period. It was not a dinosaur, shark, or marine reptile, but a huge bony fish that likely filter-fed on tiny plankton. Its fossils are often fragmentary, which makes its exact size hard to measure.

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Carnivore Jurassic oceans, shallow seas, coastal waters, and open marine habitats Europe 🐾 Lesser Bilby

Lesser Bilby Facts for Kids

The Lesser Bilby was a small extinct marsupial from Australia’s deserts. It was related to the living Greater Bilby, but smaller, paler, and with a mostly white tail. Scientists know it from only a small number of specimens, Indigenous knowledge, and scattered records from arid Australia.

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Omnivore Central Australian deserts, sand plains, dunes, spinifex grasslands, arid shrublands, burrow systems, and dry open country Oceania 🌊 Liopleurodon

Liopleurodon Facts for Kids

Liopleurodon was a powerful marine reptile from the Jurassic Period. It was not a dinosaur, but a short-necked pliosaur with a large head, sharp teeth, strong jaws, and four flippers. It hunted in ancient seas and is one of the best-known pliosaur predators.

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Carnivore Jurassic shallow seas, coastal waters, lagoons, and open marine habitats Europe 🦙 Litopterna

Litopterna Facts for Kids

Litopterna was an extinct order of native South American hoofed mammals. They were not dinosaurs, horses, camels, or llamas, although some looked a bit like familiar hoofed animals. Litopterns evolved in South America after the dinosaurs, spread into many shapes, and included long-necked Macrauchenia, one of the last members of the group.

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Herbivore South American grasslands, forests, floodplains, savannas, shrublands, river valleys, pampas, Antarctic Peninsula Eocene habitats, and diverse native ungulate ecosystems South America, Antarctica 🐋 Livyatan

Livyatan Facts for Kids

Livyatan was a gigantic extinct sperm whale relative from the Miocene seas. It was not a dinosaur and not the same as a modern sperm whale. Livyatan melvillei had massive upper and lower teeth, a huge skull, and likely hunted large marine animals, making it one of the ocean’s most powerful prehistoric predators.

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Carnivore Miocene Pacific coastal seas, Pisco Formation marine habitats, Peruvian ocean waters, open ocean hunting zones, whale-rich feeding areas, shark-rich ecosystems, coastal upwelling waters, and large marine predator habitats South America 🐦 Lord Howe Swamphen

Lord Howe Swamphen Facts for Kids

The Lord Howe Swamphen, also called the White Swamphen or Lord Howe Gallinule, was an extinct rail from Lord Howe Island east of Australia. It was not a dinosaur and not a chicken, though it walked on strong legs. It was known from early sailor accounts, paintings, skins, and bones, and it vanished very quickly after people began visiting the island.

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Omnivore Lord Howe Island lowland forests, wooded wetlands, coastal thickets, forest floors, island clearings, rocky shore edges, and nesting areas Oceania 🦕 Lurdusaurus

Lurdusaurus Facts for Kids

Lurdusaurus was a heavy plant-eating dinosaur from Early Cretaceous Niger. It was an iguanodontian, related to plant eaters such as Iguanodon, but its body was unusually bulky and low. With a small skull, long neck, powerful forelimbs, and a huge thumb spike, Lurdusaurus looked less like a speedy runner and more like a slow riverbank browser.

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Herbivore Early Cretaceous Niger riverine forests, Elrhaz Formation habitats, Gadoufaoua floodplains, ancient Sahara waterways, muddy banks, aquatic plant zones, forested river margins, and iguanodontian browsing ecosystems Africa 🐗 Lystrosaurus

Lystrosaurus Facts for Kids

Lystrosaurus was a stocky plant-eating dicynodont that lived across the end-Permian mass extinction and into the Early Triassic. It was not a dinosaur, but a therapsid on the broad evolutionary branch that later produced mammals. Its short face carried a horny beak and usually a pair of ever-growing tusks, while powerful forelimbs helped it walk and dig in a harsh changing world.

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Herbivore Late Permian and Early Triassic floodplains, dry river valleys, seasonal wetlands, polar lowlands, burrow systems, and harsh terrestrial habitats across Pangaea Africa, Asia, Antarctica 🐅 Machairodus

Machairodus Facts for Kids

Machairodus was a large saber-toothed cat that lived during the Late Miocene. It was a true member of the cat family but was not a tiger or the same animal as Smilodon. The well-known species Machairodus aphanistus combined long, flattened upper canines with a skull that was less extremely modified than those of later saber-toothed cats, while strong neck muscles helped control its dangerous bite.

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Carnivore Late Miocene woodlands, wooded grasslands, scrub, rocky valleys, seasonal lakeshores, and open terrestrial habitats Europe, Asia, North America 🐊 Machimosaurus

Machimosaurus Facts for Kids

Machimosaurus was a large marine and coastal crocodyliform that lived near the end of the Jurassic and survived into the Early Cretaceous. It was not a dinosaur or a modern crocodile, but a teleosauroid thalattosuchian. Its short, broad snout and stout, blunt teeth were built for powerful bites, allowing it to tackle armored prey such as marine turtles as well as other large animals.

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Carnivore Late Jurassic and Early Cretaceous shallow seas, coastal lagoons, estuaries, brackish channels, carbonate platforms, and nearshore marine habitats Europe, Africa 🦙 Macrauchenia

Macrauchenia Facts for Kids

Macrauchenia was a strange extinct South American mammal from the Ice Age. It was not a dinosaur, camel, llama, or horse, even though its long neck and body can look camel-like. Macrauchenia belonged to Litopterna, a vanished group of native South American hoofed mammals, and its nostrils sat high on the skull in a way that still makes scientists debate its face.

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Herbivore Late Pleistocene South American grasslands, open woodlands, savannas, shrublands, river valleys, arid plains, pampas, and mixed grazing-browsing habitats South America 🦕 Maiasaura

Maiasaura Facts for Kids

Maiasaura was a duck-billed plant-eating dinosaur from Late Cretaceous North America. Its name means good mother lizard because fossils from nesting sites showed eggs, babies, and young dinosaurs together, giving scientists important clues about dinosaur family life.

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Herbivore Cretaceous floodplains, nesting grounds, forests, and coastal plains North America 🦖 Mapusaurus

Mapusaurus Facts for Kids

Mapusaurus was a giant meat-eating dinosaur from Late Cretaceous Argentina. It was not T. rex, but it was a carcharodontosaurid, part of the shark-toothed predator family close to Giganotosaurus. Mapusaurus is famous from a bonebed with several individuals, giving scientists rare clues about a huge theropod population.

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Carnivore Late Cretaceous Patagonian floodplains, Huincul Formation habitats, Neuquén Basin river systems, semi-arid forests, giant sauropod ecosystems, muddy channels, bonebed localities, and South American predator territories South America 🦐 Marrella

Marrella Facts for Kids

Marrella was a tiny marine arthropod that lived about 505 million years ago and is famous from Canada’s Burgess Shale. It was not a crab, shrimp, or trilobite. Its wedge-shaped head shield carried long backward-pointing spines, while slender antennae, paddle-like head appendages, many walking legs, and delicate gills helped it move and feed just above the seafloor.

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Omnivore Middle Cambrian marine seafloors, soft muddy bottoms, low swimming zones above sediment, sponge communities, and offshore shelf habitats of the Burgess Shale North America 🦕 Massospondylus

Massospondylus Facts for Kids

Massospondylus was an early sauropodomorph dinosaur from southern Africa. It was not a giant sauropod like Diplodocus, but it belonged near the early branch that later led to long-necked giants. Massospondylus is especially famous because eggs, embryos, and nesting sites in South Africa give scientists rare clues about dinosaur babies.

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Herbivore Late Triassic to Early Jurassic southern African floodplains, Elliot Formation habitats, Golden Gate Highlands nesting areas, seasonal river valleys, fern and conifer vegetation, lake margins, red siltstone beds, and early sauropodomorph ecosystems Africa 🦣 Mastodon

Mastodon Facts for Kids

Mastodons were extinct elephant relatives that lived in North America during the Ice Age. They were not dinosaurs, and they were not the same as mammoths. Mastodons had tusks, trunks, heavy bodies, and bumpy cone-shaped molars suited for browsing leaves, twigs, and forest plants.

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Herbivore Ice Age forests, wetlands, woodlands, swamps, shrublands, and river valleys North America 🐊 Mastodonsaurus

Mastodonsaurus Facts for Kids

Mastodonsaurus was a giant aquatic temnospondyl that lived in European lakes, rivers, and brackish waters during the Middle Triassic. It was not a dinosaur or a true modern amphibian, although it belonged to an ancient amphibian-grade branch of tetrapods. Its enormous flattened skull carried rows of teeth, large palate fangs, and two lower-jaw tusks that passed through openings in the roof of its mouth.

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Carnivore Middle Triassic lakes, rivers, floodplain channels, brackish lagoons, muddy wetlands, and shallow aquatic habitats across ancient Europe Europe 🐦 Mauritian Blue Pigeon

Mauritian Blue Pigeon Facts for Kids

The Mauritian Blue Pigeon, often called the Mauritius Blue Pigeon, was a colorful extinct pigeon from Mauritius. It was not a dinosaur and not an ordinary city pigeon. This island bird had blue body feathers, white neck hackles, red bare skin and tail feathers, and it lived in forests before disappearing in the 1800s.

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Herbivore Mauritius forests, native woodlands, fruiting trees, island lowlands, palm groves, nesting areas, and Mascarene forest habitats Africa 🦎 Megalania

Megalania Facts for Kids

Megalania, also called Varanus priscus, was a giant extinct monitor lizard from Pleistocene Australia. It was not a dinosaur and not a crocodile. It was a huge reptile related to modern monitor lizards, and many scientists consider it the largest land-dwelling lizard known from fossils.

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Carnivore Pleistocene Australian woodlands, scrublands, open forests, rocky areas, river valleys, dry plains, waterhole edges, and megafauna habitats Oceania 🐟 Megalichthys

Megalichthys Facts for Kids

Megalichthys was a predatory lobe-finned fish that lived in freshwater habitats during the late Paleozoic Era. It belonged to the tetrapodomorph branch, meaning it was more closely related to four-limbed vertebrates than to ordinary ray-finned fish. Its broad skull, large fangs, fleshy paired fins, and shiny cosmine-covered scales made it a powerful hunter in rivers, lakes, and coal-swamp waterways.

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Carnivore Late Paleozoic freshwater rivers, lakes, coal swamps, floodplain channels, forested wetlands, and slow-moving waterways Europe, North America, Africa 🦌 Megaloceros

Megaloceros Facts for Kids

Megaloceros was a genus of giant deer from the Ice Age. Its most famous species, Megaloceros giganteus, is often called the Irish elk or giant deer, but it was not a true modern elk. Male Megaloceros are famous for enormous antlers that spread wider than almost any deer antlers known.

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Herbivore Ice Age grasslands, open woodlands, steppe-woodlands, river valleys, and shrublands Europe, Asia 🦈 Megalodon

Megalodon Facts for Kids

Megalodon was a gigantic prehistoric shark, not a dinosaur or marine reptile. It lived millions of years after the non-bird dinosaurs went extinct. Megalodon is famous for enormous serrated teeth, powerful jaws, and fossil clues that show it hunted large ocean animals.

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Carnivore Warm prehistoric oceans, coastal waters, open seas, and nursery areas Worldwide 🦖 Megalosaurus

Megalosaurus Facts for Kids

Megalosaurus was a large meat-eating dinosaur from Middle Jurassic England. It was not T. rex, and it lived much earlier. Megalosaurus is famous because William Buckland described it in 1824, making it the first dinosaur to receive a scientific name, even before the word dinosaur existed.

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Carnivore Middle Jurassic English coastal plains, Oxfordshire lagoon margins, Stonesfield Slate environments, shallow sea nearby habitats, wooded islands, muddy shorelines, small prey ecosystems, and early dinosaur science fossil localities Europe 🐆 Megantereon

Megantereon Facts for Kids

Megantereon was a stocky saber-toothed cat that lived across Africa, Europe, and Asia during the Pliocene and Pleistocene. It was not a tiger, although it belonged to the cat family. Flattened upper canines, a protective flange on the lower jaw, powerful front limbs, and a strong neck suggest that it ambushed prey, wrestled it down, and delivered a carefully placed killing bite.

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Carnivore Pliocene and Pleistocene woodlands, scrub, rocky valleys, open grasslands, forest edges, and mixed terrestrial habitats across the Old World Africa, Europe, Asia 🦥 Megatherium

Megatherium Facts for Kids

Megatherium was a giant ground sloth from South America. It was not a dinosaur, and it was not a tree sloth like the small sloths alive today. Megatherium was an enormous Ice Age mammal with huge claws, a strong tail, and a body built for walking on the ground and reaching plants.

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Herbivore Ice Age forests, woodlands, grasslands, savannas, shrublands, and open plains South America 🐺 Megistotherium

Megistotherium Facts for Kids

Megistotherium was a huge extinct meat-eating mammal from the Miocene of Africa. It was not a dinosaur and not a true hyena. Megistotherium osteothlastes was a hyaenodont, a vanished kind of carnivorous mammal, and it is famous for a large skull from Gebel Zelten in Libya.

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Carnivore Early to middle Miocene African floodplains, Gebel Zelten habitats, dry river valleys, open woodlands, savanna-like areas, proboscidean habitats, fossil basins, and large predator ecosystems Africa, Asia 🐢 Meiolania

Meiolania Facts for Kids

Meiolania was a giant extinct horned turtle from Australasia. It was not a dinosaur and not a tortoise you would want to bump into. Meiolania had a big shell, strange horns on its skull, and an armored tail with a club-like end, making it one of the most spectacular turtle-shaped tanks in prehistory.

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Herbivore Lord Howe Island forests and open habitats, mainland Australian fossil sites, New Caledonian habitats, Vanuatu island sites, Pacific island woodlands, shrublands, and land turtle nesting areas Oceania 🐴 Merychippus

Merychippus Facts for Kids

Merychippus was an extinct horse relative from Miocene North America. It was not a dinosaur and not exactly the same as a modern horse, but it was an important step in horse evolution. Merychippus kept three toes, had longer legs than earlier horses, and developed high-crowned teeth that helped it graze on tougher grasses.

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Herbivore Miocene North American grasslands, open plains, savanna-like habitats, woodland edges, river valleys, grazing areas, fossil badlands, and evolving prairie ecosystems North America 🐴 Mesohippus

Mesohippus Facts for Kids

Mesohippus was an extinct early horse from Oligocene North America. It was not a dinosaur and not a modern horse. Its name means middle horse because it lived after tiny early horses and before later, more grassland-adapted horses. Mesohippus had three toes on each foot, longer legs than earlier horses, and teeth suited for browsing leaves.

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Herbivore Oligocene North American forests, open woodlands, leafy browsing habitats, river valleys, floodplains, Great Plains fossil areas, Colorado fossil sites, and Canadian fossil localities North America 🌊 Metriorhynchus

Metriorhynchus Facts for Kids

Metriorhynchus was a fully marine crocodyliform that lived in Jurassic seas. It was related to crocodilians but looked very different from a modern crocodile. Paddle-shaped limbs, a fish-like tail fluke, smooth skin without bony armor, and enlarged salt-processing organs made metriorhynchids superb ocean swimmers. Modern taxonomic work restricts the name Metriorhynchus more narrowly than many older books did.

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Carnivore Jurassic open seas, coastal marine waters, offshore lagoons, continental shelves, and warm European ocean environments Europe 🪽 Microraptor

Microraptor Facts for Kids

Microraptor was a small feathered dinosaur from Early Cretaceous China. It was not a modern bird, but it was a dromaeosaurid raptor close to the bird line. Microraptor is famous for having long feathers on both its arms and legs, giving it a four-winged shape, and studies show it likely had glossy black, iridescent feathers.

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Carnivore Early Cretaceous Liaoning lake forests, Jiufotang Formation habitats, northeastern Chinese woodland margins, volcanic ash fossil beds, tree-rich wetlands, fish-bearing lakes, small bird ecosystems, and feathered raptor habitats Asia 🐦 Mihirung

Mihirung Facts for Kids

Mihirung is a name used for Australia’s extinct giant flightless birds in the family Dromornithidae. It is more of a group name than one single animal, so this page covers the thunder birds as a group. Some mihirungs were taller than people, and Dromornis stirtoni may have been one of the heaviest birds ever known.

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Herbivore Ancient Australian forests, woodlands, wetlands, lake edges, river valleys, scrublands, open plains, and megafauna habitats Oceania 🦕 Minmi

Minmi Facts for Kids

Minmi was a small armored dinosaur from Early Cretaceous Queensland, Australia. It was not Ankylosaurus, but it belonged to the wider armored dinosaur group called ankylosaurs. Minmi is famous as the first ankylosaur named from the Southern Hemisphere and for bony armor plus unusual rods along its backbone.

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Herbivore Early Cretaceous Queensland floodplains, Bungil Formation habitats, Australian river plains, fern-rich ground cover, cycad patches, conifer woodlands, low vegetation zones, and Southern Hemisphere ankylosaur ecosystems Australia 🐦 Moa

Moa Facts for Kids

Moa were extinct flightless birds from New Zealand. They were not dinosaurs, and they were not just one species. There were several kinds of moa, from turkey-sized birds to giant species taller than many people. Moa were plant eaters and are famous because they had no wings at all.

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Herbivore New Zealand forests, shrublands, grasslands, wetlands, fern habitats, and lowland to upland areas Oceania 🐘 Moeritherium

Moeritherium Facts for Kids

Moeritherium was an early proboscidean that lived in northern Africa during the Eocene Epoch. It was not a modern elephant and probably lacked a long elephant-style trunk. A long body, short limbs, high-set eyes and ears, and chemical clues from its teeth suggest that it spent substantial time in or near water while feeding on soft vegetation.

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Herbivore Eocene wetlands, shallow lakes, river margins, coastal plains, estuaries, marshes, and plant-rich waters of northern Africa Africa 🦖 Monolophosaurus

Monolophosaurus Facts for Kids

Monolophosaurus was a meat-eating dinosaur from Middle Jurassic Xinjiang, China. It was not Dilophosaurus and not T. rex, but a crested theropod with one tall crest running along the middle of its skull. Its skull is one of the best-known Middle Jurassic Chinese theropod skulls, giving scientists a valuable predator puzzle piece.

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Carnivore Middle Jurassic Xinjiang floodplains, Shishugou Formation habitats, Junggar Basin river systems, semi-arid woodlands, lake margins, sandy channels, small prey habitats, and Chinese theropod ecosystems Asia 🐾 Moropus

Moropus Facts for Kids

Moropus was a strange extinct hoofed mammal from Miocene North America. It was not a dinosaur, horse, gorilla, or sloth, but it belonged to the odd-toed hoofed mammal branch that also includes horses, rhinos, and tapirs. Moropus had longer front limbs, a somewhat long neck, and claws instead of normal hooves, probably useful for pulling down leafy branches.

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Herbivore Early to middle Miocene North American woodlands, open forests, Agate Springs habitats, river valleys, leafy browsing areas, Great Plains fossil sites, forest edges, and branch-pulling feeding zones North America 🌊 Mosasaurus

Mosasaurus Facts for Kids

Mosasaurus was a giant marine reptile from the Late Cretaceous Period. It was not a dinosaur, but a sea-living relative of lizards and snakes. Mosasaurus had powerful jaws, sharp teeth, flippers, and a long body built for hunting in ancient oceans.

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Carnivore Late Cretaceous oceans, seaways, coastal waters, and warm shallow seas Europe, North America, Africa 🐂 Moschops

Moschops Facts for Kids

Moschops was a heavily built plant-eating therapsid that lived in what is now South Africa during the Middle Permian. It was not a dinosaur, reptile, or mammal, although it belonged to the synapsid branch that later produced mammals. Its small head had an extraordinarily thickened skull roof, while a barrel-shaped body and strong limbs supported a mass of roughly 400 kilograms in one recent reconstruction.

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Herbivore Middle Permian river floodplains, seasonal wetlands, dry lowlands, wooded plains, and terrestrial habitats of the South African Karoo Africa 🐬 Muraenosaurus

Muraenosaurus Facts for Kids

Muraenosaurus was a long-necked plesiosaur from the Middle Jurassic seas of England. It was not a dinosaur. Its name means moray-eel lizard because its small head and extremely long neck gave early scientists an eel-like impression. A large individual measured about 5 metres long and carried 44 vertebrae in its neck.

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Carnivore Middle Jurassic shallow seas, warm shelf waters, muddy offshore environments, island channels, coastal marine habitats, and ammonite-rich waters of the Oxford Clay Europe 🦕 Mussaurus

Mussaurus Facts for Kids

Mussaurus was an early long-necked sauropodomorph dinosaur from Early Jurassic Patagonia, Argentina. It was not a giant sauropod like Brachiosaurus, but it belonged near the branch that later led to giants. Mussaurus is famous because eggs, embryos, juveniles, and adults from one site show some of the earliest evidence of herd-living among dinosaurs.

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Herbivore Early Jurassic Patagonian floodplains, Laguna Colorada Formation habitats, playa lake margins, loessic dust deposits, semi-arid nesting grounds, fern-rich vegetation patches, dry seasonal plains, and early sauropodomorph herd ecosystems South America 🦕 Nanshiungosaurus

Nanshiungosaurus Facts for Kids

Nanshiungosaurus was a strange plant-eating therizinosaur dinosaur from Late Cretaceous southern China. It was not a giant raptor and not a sauropod, even though it had a long neck and bulky body. Like other therizinosaurs, Nanshiungosaurus likely had long arms, big claws, a pot-bellied body, and a mostly leafy diet.

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Herbivore Late Cretaceous southern Chinese floodplains, Nanxiong Formation mudstones and siltstones, warm humid subtropical habitats, river plains, leafy browsing zones, oviraptorid nesting regions, ornithopod track areas, and Asian therizinosaur ecosystems Asia 🦕 Nasutoceratops

Nasutoceratops Facts for Kids

Nasutoceratops was a horned dinosaur from Late Cretaceous Utah. It was not Triceratops, but it belonged to the ceratopsid family and had one of the most memorable faces in the group. Its name means big-nose horned face, and it had a large rounded snout, long curved brow horns, and a fairly simple frill.

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Herbivore Late Cretaceous southern Utah floodplains, Kaiparowits Formation habitats, Grand Staircase-Escalante coastal plain forests, swampy lowlands, river channels, low vegetation zones, and southern Laramidian ceratopsian ecosystems North America 🐹 Neochoerus

Neochoerus Facts for Kids

Neochoerus was an extinct genus of giant capybaras that lived across parts of North, Central, and South America during the Pliocene and Pleistocene. It was a true rodent closely related to living capybaras, not a pig or hippopotamus. Its barrel-shaped body, short legs, high-crowned teeth, and frequent association with lakes and rivers suggest a plant-eating, water-loving lifestyle.

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Herbivore Late Pliocene and Pleistocene lakeshores, river margins, marshes, ponds, wetlands, floodplains, and nearby grasslands across the Americas North America, South America 🐹 Neoepiblema

Neoepiblema Facts for Kids

Neoepiblema was a giant South American rodent that lived during the Late Miocene. It belonged to an extinct chinchilloid family called Neoepiblemidae and was not a giant rat. Fossils from western Amazonia show a heavy-bodied herbivore with powerful limbs, a long skull, ever-growing teeth, and the ability to walk on land while possibly digging or swimming near rivers and wetlands.

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Herbivore Late Miocene rivers, lakes, swamps, floodplains, wet forests, and water-rich lowlands of western Amazonia and nearby South American regions South America 🐦 New Zealand Quail

New Zealand Quail Facts for Kids

The New Zealand Quail, also called koreke in Māori, was a small extinct ground bird from New Zealand. It was not a dinosaur and not the same as the introduced brown quail. It lived in tussock grasslands and fernlands, ate seeds and green plant foods, and was extinct by 1875.

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Herbivore New Zealand tussock grasslands, open fernlands, lowland grasslands, dry open country, grassy plains, shrubland edges, and ground nesting habitats Oceania 🦕 Nigersaurus

Nigersaurus Facts for Kids

Nigersaurus was a small long-necked sauropod dinosaur from Early Cretaceous Niger. It was not a meat-eater and not a giant like Brachiosaurus. Nigersaurus is famous for its wide straight-edged muzzle packed with more than 500 replaceable teeth, which helped it crop low plants like a prehistoric lawn trimmer.

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Herbivore Early Cretaceous Niger floodplains, Elrhaz Formation habitats, Gadoufaoua river systems, low fern and horsetail zones, wetland margins, ancient Sahara waterways, crocodyliform-rich ecosystems, and African sauropod browsing habitats Africa 🦜 Norfolk Kaka

Norfolk Kaka Facts for Kids

The Norfolk Kaka was a recently extinct parrot from Norfolk Island and nearby Phillip Island. It was not a dinosaur and not the same as New Zealand's living kākā, though it was a close relative. This large island parrot used its strong beak to feed on flowers, blossoms, fruits, and seeds before it disappeared in the 1800s.

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Herbivore Norfolk Island forests, Phillip Island habitats, native woodlands, flowering trees, coastal forests, tree hollows, and South Pacific island habitats Oceania 🌊 Nothosaurus

Nothosaurus Facts for Kids

Nothosaurus was a semi-aquatic marine reptile from the Triassic Period. It was not a dinosaur, but an older sea-going reptile with a long neck, long jaws, pointed teeth, strong limbs, and webbed feet. Scientists think it may have lived a bit like a seal, hunting in water and resting near shore.

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Carnivore Triassic shallow seas, lagoons, shorelines, and coastal waters Europe, Asia, Africa 🦏 Notoungulate

Notoungulate Facts for Kids

Notoungulates were an extinct order of native South American hoofed mammals. They were not dinosaurs and not the same as modern horses, cows, rhinos, or deer. The group was amazingly diverse, with tiny rabbit-like forms, sheep-like grazers, and huge rhino-like plant eaters such as Toxodon.

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Herbivore South American forests, grasslands, floodplains, savannas, shrublands, rocky uplands, pampas, wetlands, and diverse native ungulate habitats across many time periods South America, North America 🐇 Nuralagus

Nuralagus Facts for Kids

Nuralagus was a giant extinct rabbit relative from Menorca in the Mediterranean Sea. It was not a dinosaur and not a monster bunny, but it was the largest known lagomorph. Living on an island with few large predators, Nuralagus grew bulky, had shorter ears and eyes than many rabbits, and probably moved slowly instead of leaping like modern rabbits.

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Herbivore Pliocene Menorca island habitats, Mediterranean shrublands, coastal woodlands, rocky limestone areas, cave fissure deposits, herb-rich ground cover, predator-light island ecosystems, and Balearic Island landscapes Europe 🪽 Nyctosaurus

Nyctosaurus Facts for Kids

Nyctosaurus was a toothless pterosaur from the Late Cretaceous Period. It was not a dinosaur, but a flying reptile that lived around the Western Interior Seaway of North America. Some fossils show a huge antler-like head crest, making Nyctosaurus one of the strangest-looking pterosaurs.

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Carnivore Cretaceous seaways, coastlines, islands, and open ocean edges North America 🦕 Olorotitan

Olorotitan Facts for Kids

Olorotitan was a hollow-crested duck-billed dinosaur from Late Cretaceous Far Eastern Russia. It was not a swan, even though its name means gigantic swan. This lambeosaurine hadrosaur is famous for its tall helmet-like crest, unusually long neck, plant-eating teeth, and one of the most complete dinosaur skeletons ever found in Russia.

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Herbivore Late Cretaceous Far Eastern Russian floodplains, Udurchukan Formation habitats, Kundur fossil locality, Amur Region river systems, warm coastal lowlands, conifer and flowering plant zones, forested valleys, and lambeosaurine browsing ecosystems Asia 🐟 Onchopristis

Onchopristis Facts for Kids

Onchopristis was an extinct sawskate, a shark-and-ray relative with a long saw-like snout called a rostrum. It lived during the Cretaceous Period in rivers, coastal waters, and shallow habitats. Fossils show its rostrum carried barbed tooth-like structures along the sides.

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Carnivore Cretaceous rivers, estuaries, lagoons, coastal waters, and shallow seas Africa, Europe, North America 🦐 Opabinia

Opabinia Facts for Kids

Opabinia was a strange Cambrian sea animal from the Burgess Shale of Canada. It was not a dinosaur, fish, or reptile, but an extinct arthropod relative with five eyes, a flexible front proboscis, side swimming flaps, gills, and a tail fan. Its odd body helped make it one of the most famous animals of the Cambrian Period.

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Carnivore Cambrian oceans, shallow seas, muddy seafloors, and open marine waters North America 🐚 Orthoceras

Orthoceras Facts for Kids

Orthoceras was a straight-shelled cephalopod from ancient seas. The name is often used for fossils of long, straight nautiloid shells. These animals were related to modern nautiluses, squids, and octopuses, but they lived in hard cone-shaped shells instead of soft bodies alone.

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Carnivore Paleozoic oceans, shallow seas, reefs, seafloors, and open marine waters Worldwide 🪱 Ottoia

Ottoia Facts for Kids

Ottoia was a predatory priapulid worm that lived on and beneath the Cambrian seafloor about 505 million years ago. It could turn a muscular, tooth-lined proboscis inside out and push it from the front of its body. Rows of hooks and spines helped the worm grip prey, move through sediment, and feed on animals such as the small shelled creature Haplophrentis.

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Carnivore Middle Cambrian muddy seafloors, soft sediment burrows, low oxygen bottom waters, sponge communities, and quiet offshore shelf habitats North America 🦕 Ouranosaurus

Ouranosaurus Facts for Kids

Ouranosaurus was a large plant-eating ornithopod dinosaur from Early Cretaceous Niger. It was not a duck-billed hadrosaur, but it was an iguanodontian relative from the line near hadrosaurs. Ouranosaurus is famous for its tall back spines that likely formed a sail or hump, plus a beak and plant-grinding teeth.

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Herbivore Early Cretaceous Niger floodplains, Elrhaz Formation and Gadoufaoua habitats, river margins, fern and horsetail zones, conifer woodlands, semi-arid seasonal plains, ancient Sahara waterways, and African iguanodontian browsing ecosystems Africa 🦖 Oviraptor

Oviraptor Facts for Kids

Oviraptor was a small bird-like dinosaur from Late Cretaceous Asia with a toothless beak, long legs, feathers, and a mysterious fossil history. Its name means egg thief, but later discoveries showed that some oviraptor-like dinosaurs were actually caring for their own nests.

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Omnivore Cretaceous deserts, sandy plains, and semi-arid habitats Asia 🦕 Pachycephalosaurus

Pachycephalosaurus Facts for Kids

Pachycephalosaurus was a plant-eating dinosaur famous for its thick rounded skull dome. It lived in western North America near the end of the Cretaceous Period, and scientists still debate exactly how it used its unusual head.

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Omnivore Cretaceous floodplains, forests, and open woodland edges North America 🦕 Pachyrhinosaurus

Pachyrhinosaurus Facts for Kids

Pachyrhinosaurus was a thick-nosed horned dinosaur from Late Cretaceous North America. It was not Triceratops, and instead of a long nose horn it had a large bony boss on its snout, with smaller bosses above the eyes. Fossils from Alberta and Alaska show a bulky plant eater that may have traveled in herds.

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Herbivore Late Cretaceous Alberta coastal plains, Horseshoe Canyon and Wapiti Formation habitats, Alaskan North Slope polar forests, Denali trackway regions, river valleys, warm northern lowlands, seasonal dark winter habitats, and centrosaurine herd ecosystems North America 🐋 Pakicetus

Pakicetus Facts for Kids

Pakicetus was one of the earliest known whale relatives from Eocene Pakistan. It was not a dinosaur and not a modern whale. Pakicetus had long legs, a land-mammal body, and special ear bones that link it to whales, making it one of the most famous fossils in the story of how whales evolved from land-dwelling ancestors.

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Carnivore Early Eocene Pakistan riverbanks, Kuldana Formation floodplains, shallow streams, muddy water edges, freshwater margins, warm lowland habitats, coastal-adjacent basins, and early whale transition environments Asia 🐘 Palaeoloxodon

Palaeoloxodon Facts for Kids

Palaeoloxodon was an extinct genus of elephants that included the famous straight-tusked elephants. It was not a dinosaur and not a woolly mammoth, though it lived during the Ice Age alongside many other giant mammals. Some Palaeoloxodon species were enormous forest elephants, while island species became tiny dwarf elephants.

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Herbivore Pleistocene African woodlands, European temperate forests, Mediterranean woodlands, Asian forest edges, interglacial river valleys, island habitats for dwarf species, grassland margins, and elephant browsing landscapes Africa, Europe, Asia 🐘 Palaeomastodon

Palaeomastodon Facts for Kids

Palaeomastodon was an early elephantiform proboscidean that lived in North Africa during the Oligocene Epoch. It was not a modern elephant or true mastodon, but it showed several features that later became familiar in elephant relatives. Its skull probably supported a short muscular trunk, while an elongated lower jaw carried broad forward-pointing tusks beneath a pair of upper tusks.

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Herbivore Oligocene river valleys, floodplains, wetlands, wooded lowlands, lake margins, and warm terrestrial habitats of North Africa Africa 🦣 Palorchestes

Palorchestes Facts for Kids

Palorchestes was an unusual extinct Australian marsupial often nicknamed the marsupial tapir. It was not a real tapir and not a dinosaur. Its skull suggests it may have had a short trunk-like snout, and its powerful forelimbs and large claws may have helped it pull down branches or dig for roots.

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Herbivore Pleistocene Australian forests, woodlands, shrublands, river valleys, browsing areas, rocky fossil sites, and mixed Ice Age habitats Oceania 🛡️ Panochthus

Panochthus Facts for Kids

Panochthus was a giant armored glyptodont that lived across much of South America during the Pleistocene. It was a mammal and a relative of armadillos, not a dinosaur or turtle. Hundreds of interlocking osteoderms formed a domed carapace over its body, while the end of its tail was enclosed in a rigid bony tube that could function as a formidable defensive or fighting weapon.

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Herbivore Pleistocene grasslands, open savannas, dry scrub, river floodplains, high Andean basins, and temperate plains across central and southern South America South America 🦏 Paraceratherium

Paraceratherium Facts for Kids

Paraceratherium was a gigantic extinct hornless rhinoceros relative from the Oligocene. It was not a dinosaur and not an elephant, even though it was one of the biggest land mammals ever. This long-necked browser lived across parts of Asia and eastern Europe, reaching high branches with a huge body, long legs, and possibly a flexible upper lip.

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Herbivore Oligocene Asian woodlands, open forests, floodplains, river valleys, scrublands, tall browsing zones, Pakistan fossil areas, Mongolian basins, and Eurasian herbivore habitats Asia, Europe 🦜 Paradise Parrot

Paradise Parrot Facts for Kids

The Paradise Parrot was a colorful extinct parrot from eastern Australia. It was not a dinosaur, and it was not a rainforest macaw. This ground-feeding parrot lived in grassy woodlands near the Queensland and New South Wales border area, nested in termite mounds, and has not been confirmed alive since 1927.

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Herbivore Eastern Australian grassy woodlands, open forests, grasslands, termite mound nesting areas, dry woodland edges, and seed-rich ground habitats Oceania 🛡️ Parapropalaehoplophorus

Parapropalaehoplophorus Facts for Kids

Parapropalaehoplophorus was a small early glyptodont that lived in northern Chile during the Early Miocene. Glyptodonts were heavily armored relatives of armadillos, but this species was far smaller than later giants such as Glyptodon and Panochthus. Its body was protected by a solid mosaic of rounded osteoderms, and its teeth changed from simple shapes at the front of the jaw to three-lobed grinding teeth farther back.

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Herbivore Early Miocene open woodland, scrubby plains, volcanic floodplains, river margins, and low-elevation habitats that were later lifted into the northern Chilean Andes South America 🦕 Parasaurolophus

Parasaurolophus Facts for Kids

Parasaurolophus was a duck-billed plant-eating dinosaur with a long hollow crest stretching from the back of its head. It lived during the Late Cretaceous Period in North America and is famous for a crest that may have helped it make sounds.

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Herbivore Cretaceous forests, floodplains, and coastal plains North America 🐦 Passenger Pigeon

Passenger Pigeon Facts for Kids

The passenger pigeon was a recently extinct bird from North America. It was not a dinosaur, and it was not the same as the city pigeons people see today. Passenger pigeons once flew in enormous flocks through eastern forests, but hunting and habitat loss pushed them to extinction in 1914.

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Omnivore Eastern North American forests, woodlands, nesting colonies, river valleys, and farmland edges North America 🪽 Pelagornis

Pelagornis Facts for Kids

Pelagornis was a giant extinct seabird with long wings and strange bony tooth-like spikes along its beak. It was not a pterosaur and not a dinosaur. The famous species Pelagornis sandersi may have had the largest wingspan of any known flying bird and glided over ancient oceans around 25 million years ago.

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Carnivore Oligocene Atlantic coastal seas, ancient South Carolina marine waters, open ocean air currents, shorelines, offshore feeding zones, Charleston fossil sediments, and seabird nesting coasts North America 🐃 Pelorovis

Pelorovis Facts for Kids

Pelorovis was a genus of large wild cattle that lived in Africa during the Early Pleistocene. The best-known species, Pelorovis oldowayensis, had a long face and massive horn cores curving outward and upward in broad half-moons. It was a grazing bovid related to cattle and buffalo, but its exact family position is debated, and some scientists place the genus close to or inside Bos.

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Herbivore Early Pleistocene open grasslands, wooded savannas, volcanic plains, river valleys, lake basins, and grazing habitats of eastern and northern Africa Africa 🐦 Phorusrhacos

Phorusrhacos Facts for Kids

Phorusrhacos was a giant extinct flightless bird from Miocene South America. It was not a dinosaur and not a modern ostrich. It belonged to the phorusrhacids, better known as terror birds, a group of powerful running predators with huge hooked beaks and long legs.

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Carnivore Miocene Patagonian grasslands, open woodlands, shrublands, dry plains, floodplains, Santa Cruz Formation habitats, Monte León Formation habitats, and South American predator ecosystems South America 🐾 Pig-Footed Bandicoot

Pig-Footed Bandicoot Facts for Kids

The Pig-Footed Bandicoot was a recently extinct Australian marsupial with one of the strangest foot designs of any mammal. It was not a pig and not a rabbit. Its tiny hoof-like toes made it look as if a bandicoot borrowed feet from a miniature hoofed animal, then sprinted away through grasslands and desert plains.

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Herbivore Australian grasslands, grassy plains, open woodlands, shrublands, sand dunes, sand plains, arid flats, spinifex country, and desert-edge habitats Oceania 🐟 Pikaia

Pikaia Facts for Kids

Pikaia was a small, fish-shaped chordate that lived in the Cambrian sea about 505 million years ago. It was not a true fish and had no backbone like a modern vertebrate, but its body included important chordate features such as repeated muscle blocks and a dorsal nerve cord. A 2024 study even showed that scientists had been reconstructing the fossil upside down.

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Omnivore Middle Cambrian offshore seas, muddy seafloors, low swimming zones above sediment, sponge communities, and quiet continental shelf habitats North America 🦆 Pink-Headed Duck

Pink-Headed Duck Facts for Kids

The Pink-Headed Duck is one of the world’s great bird mysteries. It lived in wetlands of India, Bangladesh, and Myanmar, but it has not been conclusively recorded since the late 1940s. Scientists usually treat it as critically endangered and possibly extinct, because a tiny hidden population has never been fully ruled out.

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Omnivore South Asian wetlands, marshes, swamps, reedbeds, pools, oxbow lakes, quiet ponds, and remote wetland forests Asia 🐢 Pinta Island Tortoise

Pinta Island Tortoise Facts for Kids

The Pinta Island Tortoise was a giant tortoise from Pinta Island in the Galápagos. It was not a dinosaur, but a reptile related to other Galápagos giant tortoises. The last known Pinta Island Tortoise, Lonesome George, died on June 24, 2012, making the subspecies a famous symbol of extinction and conservation.

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Herbivore Galápagos dry island habitats, cactus zones, shrublands, grasslands, volcanic slopes, and Pinta Island lowlands South America 🦏 Placerias

Placerias Facts for Kids

Placerias was a giant plant-eating dicynodont that lived in North America during the Late Triassic. It was not a dinosaur or a mammal, but it belonged to the therapsid branch that eventually produced mammals. A horny beak cropped vegetation, while large tusk-like projections on the upper jaw varied greatly between individuals and may have been used for display or competition.

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Herbivore Late Triassic seasonal floodplains, river margins, dry lowlands, drought-prone basins, wooded plains, and terrestrial habitats of the Chinle region North America 🦎 Placodus

Placodus Facts for Kids

Placodus was a stocky placodont that lived in shallow seas during the Middle Triassic. It was not a dinosaur. Its front teeth projected forward like chisels for pulling hard-shelled animals from rocks or the seafloor, while broad flat teeth farther back crushed the shells. Its barrel-shaped body, strong ribs, and long tail made it better suited to coastal water than fast open-ocean swimming.

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Carnivore Middle Triassic shallow seas, rocky coastal waters, seafloor feeding grounds, warm continental shelves, lagoons, and shell-rich marine habitats Europe, Asia 🦕 Plateosaurus

Plateosaurus Facts for Kids

Plateosaurus was an early long-necked dinosaur from Late Triassic Europe. It was not a giant sauropod like Brachiosaurus, but it belonged to the sauropodomorph line that later produced gigantic long-necked dinosaurs. Plateosaurus had a long neck, small head, strong back legs, a horny beak, grinding teeth, and a plant-eating lifestyle.

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Herbivore Late Triassic European floodplains, Germany and Switzerland bonebed regions, seasonal river valleys, fern and conifer vegetation, semi-arid lowlands, muddy basins, early dinosaur habitats, and sauropodomorph browsing ecosystems Europe 🐘 Platybelodon

Platybelodon Facts for Kids

Platybelodon was a strange shovel-tusked proboscidean that lived in Asia during the Middle Miocene. It was an elephant relative, but not a true elephant or modern elephant ancestor. Its lower jaw widened into a broad scoop carrying flat incisor tusks. Older artwork showed it dredging swamp mud, but wear marks and biomechanical studies instead suggest that its trunk and lower tusks cut, stripped, or processed tough vegetation.

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Herbivore Middle Miocene open woodlands, wooded grasslands, river floodplains, shrublands, and increasingly dry terrestrial habitats of central and eastern Asia Asia 🌊 Plesiosaurus

Plesiosaurus Facts for Kids

Plesiosaurus was a long-necked marine reptile from the Early Jurassic Period. It was not a dinosaur, but a sea reptile with a small head, sharp teeth, broad body, short tail, and four flippers. Fossils from England helped make Plesiosaurus one of the classic prehistoric sea animals.

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Carnivore Jurassic shallow seas, coastal waters, lagoons, and open marine habitats Europe 🐴 Pliohippus

Pliohippus Facts for Kids

Pliohippus was an extinct horse relative from late Miocene North America. It was not a dinosaur and not exactly the direct ancestor of modern horses, even though older books often showed it that way. Pliohippus looked very horse-like, had long slim legs, usually a strong main toe, grazing teeth, and deep facial pits on its skull.

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Herbivore Late Miocene North American steppe grasslands, Great Plains habitats, Colorado fossil areas, Nebraska fossil beds, Dakota fossil sites, Canadian plains, open prairies, and grazing ecosystems North America 🐬 Pliosaurus

Pliosaurus Facts for Kids

Pliosaurus was a genus of huge, short-necked plesiosaurs that hunted in Late Jurassic seas. It was not a dinosaur. Different species lived around Europe and the Arctic, and the largest were probably around 10 metres long or more, although exact estimates remain uncertain because complete skeletons are rare.

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Carnivore Late Jurassic open seas, continental shelf waters, Arctic marine basins, deep channels, coastal oceans, and ammonite-rich waters around Europe Europe 🐊 Prionosuchus

Prionosuchus Facts for Kids

Prionosuchus was a huge aquatic temnospondyl that lived in tropical lakes and wetlands of what is now northeastern Brazil during the Early Permian. It was not a crocodile or dinosaur, although its extremely long snout and fish-eating lifestyle made it look crocodile-like. Most fossils are incomplete, so its maximum body length remains uncertain, but one giant individual may have exceeded 5.5 metres.

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Carnivore Early Permian tropical continental lakes, deep freshwater basins, seasonally wet floodplains, river channels, ponds, and forested wetlands of northeastern Brazil South America 🐒 Proconsul

Proconsul Facts for Kids

Proconsul was an extinct early ape from the Miocene of eastern Africa. It was not a dinosaur, monkey, chimpanzee, or human, but it helps scientists study the early ape branch of primate evolution. Proconsul had no tail like apes, but many body features still looked monkey-like, making it a famous fossil blend of old and new traits.

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Herbivore Early Miocene eastern African forests, Rusinga Island habitats, Lake Victoria region woodlands, Kenya and Uganda fossil sites, tree-rich landscapes, forest edges, fruiting canopies, and early ape ecosystems Africa 🦘 Procoptodon

Procoptodon Facts for Kids

Procoptodon was a giant extinct short-faced kangaroo from Pleistocene Australia. It was not a dinosaur and not a normal modern kangaroo. The best-known species, Procoptodon goliah, was the largest kangaroo known to science, with a short flat face, powerful legs, long clawed fingers, and unusual single-toed feet.

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Herbivore Pleistocene Australian woodlands, shrublands, open forests, grasslands, river valleys, dry plains, and leafy browsing habitats Oceania 🦕 Protoceratops

Protoceratops Facts for Kids

Protoceratops was a small horned-dinosaur relative from Late Cretaceous Asia. It had a parrot-like beak, a bony frill, four sturdy legs, and no large nose horn like Triceratops. Its fossils are famous from Mongolia and include eggs, nests, and the dramatic fighting dinosaurs fossil.

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Herbivore Cretaceous deserts, sandy plains, and semi-arid scrublands Asia 🐢 Protostega

Protostega Facts for Kids

Protostega was a giant extinct sea turtle from the Late Cretaceous. It was not a dinosaur and not the same as Archelon, though both were enormous prehistoric turtles. Protostega gigas swam through the warm Western Interior Seaway of North America using long flippers like underwater wings.

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Omnivore Late Cretaceous Western Interior Seaway, warm shallow inland seas, Kansas marine chalk habitats, open water, nesting beaches, predator-rich seaways, and Cretaceous marine ecosystems North America 🦕 Psittacosaurus

Psittacosaurus Facts for Kids

Psittacosaurus was a small beaked dinosaur from Early Cretaceous Asia. It was not Triceratops, but it was an early ceratopsian relative from the same broad horned-dinosaur line. Psittacosaurus had a parrot-like beak, strong cheek bones, plant-eating teeth, and in some fossils, long bristle-like structures along the tail.

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Herbivore Early Cretaceous Asian forests, northeastern Chinese lake margins, Mongolian and Russian lowlands, river floodplains, fern and conifer vegetation, dry woodland edges, preserved skin fossil beds, and early ceratopsian browsing ecosystems Asia 🪽 Pteranodon

Pteranodon Facts for Kids

Pteranodon was a large flying reptile from the Late Cretaceous Period. It was not a dinosaur, but a pterosaur that lived alongside dinosaurs. Pteranodon had long wings, a toothless beak, a head crest, and fossils famous from ancient sea deposits in North America.

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Carnivore Cretaceous coastlines, islands, cliffs, and ancient sea edges North America 🪽 Pterodactylus

Pterodactylus Facts for Kids

Pterodactylus was a small flying reptile from the Late Jurassic Period. It was not a dinosaur, but a pterosaur with wings, a long beak-like skull, teeth, hollow bones, and fossils famously found in limestone deposits in Germany.

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Carnivore Jurassic lagoons, island shores, rocky coasts, and coastal wetlands Europe 🪽 Pterodaustro

Pterodaustro Facts for Kids

Pterodaustro was a filter-feeding pterosaur that lived beside lakes in what is now central Argentina during the Early Cretaceous. Its long jaws curved upward, and its lower jaw held as many as about 1,000 extremely thin, bristle-like teeth. These formed a natural sieve for straining tiny food from water, making Pterodaustro one of the strangest known flying reptiles.

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Omnivore Early Cretaceous freshwater lakes, shallow shorelines, mudflats, reed beds, seasonal wetlands, and dry lake-margin landscapes of central Argentina South America 🐊 Purussaurus

Purussaurus Facts for Kids

Purussaurus was a giant extinct caiman from Miocene South America. It was not a dinosaur and not a modern crocodile, though it looked like a colossal crocodilian relative. This river predator had a massive skull, powerful jaws, and lived in wetlands where turtles, fish, mammals, and other animals shared the water.

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Carnivore Miocene South American rivers, Amazon wetlands, swamps, floodplains, lake margins, tropical channels, turtle-rich waterways, and ambush hunting sites South America 🐐 Pyrenean Ibex

Pyrenean Ibex Facts for Kids

The Pyrenean Ibex, also called the bucardo, was a recently extinct wild goat from the Pyrenees and nearby mountains. It was not a dinosaur and not a domestic goat. The last natural Pyrenean Ibex, a female named Celia, died in January 2000, and a cloned baby was born in 2003 but lived only a few minutes.

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Herbivore Pyrenees mountain cliffs, rocky slopes, alpine meadows, high valleys, scrublands, forests, and rugged mountain habitats Europe 🔥 Pyrotherium

Pyrotherium Facts for Kids

Pyrotherium was a giant plant-eating South American mammal from the Late Oligocene. It looked somewhat elephant-like, but it was not an elephant or proboscidean. A massive skull, two pairs of upper tusks, one pair of lower tusks, ridged cheek teeth, and extremely robust weight-bearing bones made this fire beast one of the strangest large mammals in South American history.

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Herbivore Late Oligocene forests, wooded lowlands, semi-arid valleys, river basins, volcanic-ash landscapes, and terrestrial habitats of Argentina and Bolivia South America 🦓 Quagga

Quagga Facts for Kids

The quagga was a recently extinct zebra from southern Africa. It was not a dinosaur and not a horse exactly, but a subspecies of plains zebra. Quaggas were famous for having stripes mostly on the front of the body, while the back looked browner and less striped.

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Herbivore Southern African grasslands, dry plains, Karoo shrublands, open savannas, and grazing habitats Africa 🪽 Quetzalcoatlus

Quetzalcoatlus Facts for Kids

Quetzalcoatlus was a gigantic flying reptile from Late Cretaceous North America. It was not a dinosaur, but an azhdarchid pterosaur with huge wings, a long neck, a long toothless beak, and fossils found in Texas. It may have been one of the largest flying animals ever.

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Carnivore Cretaceous inland plains, river areas, coastal plains, and open habitats North America 🪽 Rhamphorhynchus

Rhamphorhynchus Facts for Kids

Rhamphorhynchus was a long-tailed pterosaur from the Late Jurassic Period. It was not a dinosaur, but a flying reptile with narrow wings, forward-pointing teeth, and a stiff tail ending in a soft tail vane. Beautiful fossils from Germany help scientists study its wings and body shape.

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Carnivore Jurassic lagoons, islands, rocky coasts, and coastal wetlands Europe 🐊 Rhamphosuchus

Rhamphosuchus Facts for Kids

Rhamphosuchus was a gigantic long-snouted crocodilian that lived on the Indian subcontinent during the Neogene. It belonged to the gavialoid branch containing gharials and their relatives, but its jaws were broader and more powerfully built than those of the living fish-specialist gharial. The fossils are mostly incomplete snouts and jaws, so its exact length, body shape, and diet remain partly uncertain.

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Carnivore Neogene rivers, floodplains, lakes, channels, wetlands, and waterside forests of the Siwalik and Bugti regions of the Indian subcontinent Asia 🐬 Rhomaleosaurus

Rhomaleosaurus Facts for Kids

Rhomaleosaurus was a large predatory plesiosaur that patrolled the seas around what is now Britain during the Early Jurassic. It was not a dinosaur. Unlike very long-necked plesiosaurs, it had a large head, a strong skull, a moderately short neck, and powerful conical teeth for gripping fish, cephalopods, and other marine reptiles.

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Carnivore Early Jurassic open seas, coastal shelf waters, muddy marine basins, ammonite-rich offshore habitats, deep channels, and waters near ancient British islands Europe 🦕 Riojasaurus

Riojasaurus Facts for Kids

Riojasaurus was a large early sauropodomorph dinosaur from Late Triassic Argentina. It was not a true giant sauropod like Argentinosaurus, but it was a heavy-bodied relative from before the age of the enormous long-necked dinosaurs. Riojasaurus had a long neck and tail, bulky legs, and fossils from both adults and young animals.

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Herbivore Late Triassic Argentine floodplains, Los Colorados Formation habitats, La Rioja and San Juan basin landscapes, fluvial and lacustrine environments, semi-arid river valleys, conifer and seed plant zones, early dinosaur communities, and sauropodomorph browsing ecosystems South America 🐦 Rodrigues Solitaire

Rodrigues Solitaire Facts for Kids

The Rodrigues Solitaire was a flightless bird that lived only on Rodrigues, an island in the Indian Ocean. It was not a dinosaur and not the same as the dodo, but it was the dodo's closest extinct relative. Solitaires were pigeon relatives that lived in island forests and disappeared after humans and introduced animals changed their habitat.

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Herbivore Rodrigues Island forests, coastal woodlands, lowland habitats, island valleys, and forest floors Africa 🦖 Rugops

Rugops Facts for Kids

Rugops was a meat-eating dinosaur from Late Cretaceous Niger in Africa. It was not T. rex, but it belonged to the abelisaurid family, a group of theropod predators often known for short skulls and tiny arms. Rugops is known mainly from a partial skull with a rough, wrinkled surface and rows of small holes, making its face a fossil puzzle with extra texture.

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Carnivore Late Cretaceous Niger habitats, Echkar Formation sandstones, Sahara river systems, warm floodplains, desert-edge fossil localities, small prey ecosystems, Gondwanan predator territories, and African abelisaurid habitats Africa 🦕 Saltasaurus

Saltasaurus Facts for Kids

Saltasaurus was a plant-eating sauropod dinosaur from Late Cretaceous Argentina. It was not a meat-eater and not one of the gigantic Jurassic sauropods, but it was a titanosaur with a surprising feature: bony armor plates embedded in its skin. Its discovery helped prove that at least some long-necked dinosaurs wore armor.

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Herbivore Late Cretaceous northwestern Argentine floodplains, Lecho Formation habitats, Salta Province fossil beds, Patagonian and Andean-adjacent lowlands, conifer and flowering plant zones, nesting-ground ecosystems, semi-arid river valleys, and titanosaur browsing habitats South America 🦒 Samotherium

Samotherium Facts for Kids

Samotherium was an extinct giraffid that lived across parts of Europe and Asia during the Late Miocene, with related records extending into nearby regions. It was a true member of the giraffe family but was not simply a short modern giraffe. Samotherium major had a neck anatomically intermediate between the short-necked okapi and the extremely long-necked giraffe, while long legs and a pair of ossicones completed its distinctive appearance.

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Herbivore Late Miocene open woodlands, wooded grasslands, shrublands, dry savannas, forest edges, and mixed Pikermian habitats across Eurasia Europe, Asia 🐊 Sarcosuchus

Sarcosuchus Facts for Kids

Sarcosuchus was a giant extinct crocodyliform from the Early Cretaceous. It was not a dinosaur and not a modern crocodile, though its nickname SuperCroc fits the mood. Sarcosuchus imperator lived in ancient river systems of Africa and had a long narrow snout, many teeth, and a strange rounded bump near the end of its jaws.

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Carnivore Early Cretaceous African river systems, freshwater channels, floodplains, swampy forests, Saharan wetland habitats, fish-rich waterways, and dinosaur drinking edges Africa 🦕 Sauroposeidon

Sauroposeidon Facts for Kids

Sauroposeidon was a giant long-necked sauropod dinosaur from Early Cretaceous North America. It is famous for enormous neck vertebrae, which suggest it was one of the tallest dinosaurs. Its name means earthquake god lizard, a huge name for a huge plant eater.

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Herbivore Early Cretaceous river plains, coastal floodplains, and forest edges North America 🦌 Schomburgk's Deer

Schomburgk's Deer Facts for Kids

Schomburgk's Deer was a recently extinct deer from central Thailand. It was not a dinosaur or a regular farm deer. This graceful wetland deer lived in swampy plains and long grass near the Chao Phraya River system, and males were famous for amazing basket-like antlers with many points.

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Herbivore Central Thailand wetlands, swampy plains, river floodplains, long grass areas, reeds, cane beds, marshes, and Chao Phraya basin habitats Asia 🦕 Scutellosaurus

Scutellosaurus Facts for Kids

Scutellosaurus was a small early armored dinosaur from Early Jurassic Arizona. It was not Stegosaurus or Ankylosaurus, but it belonged near the base of Thyreophora, the armored dinosaur branch that later produced both stegosaurs and ankylosaurs. Its body carried hundreds of little bony shields called osteoderms, while its long tail helped it balance.

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Herbivore Early Jurassic northern Arizona habitats, Kayenta Formation floodplains, Navajo Nation fossil localities, semi-arid river valleys, red claystone deposits, fern and seed plant zones, small herbivore ecosystems, and early armored dinosaur landscapes North America 🛡️ Scutosaurus

Scutosaurus Facts for Kids

Scutosaurus was a massive plant-eating pareiasaur that lived in what is now European Russia near the end of the Permian Period. It was not a dinosaur, turtle, or mammal. A short skull covered in knobs, a barrel-shaped body, thick limbs, and many bony plates embedded in the skin gave this one-ton herbivore a heavily armored appearance.

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Herbivore Late Permian seasonal floodplains, river plains, semi-arid lowlands, wooded valleys, dry terrestrial basins, and plant-rich habitats of northern European Russia Europe 🦦 Sea Mink

Sea Mink Facts for Kids

The Sea Mink was a recently extinct mammal from the rocky coasts of northeastern North America. It was not a sea otter or seal, but a large mink relative. It lived around the Gulf of Maine region, ate coastal prey, and was hunted heavily for its fur before scientists had much chance to study it alive.

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Carnivore Rocky northeastern North American coasts, Gulf of Maine shorelines, tide pools, islands, coastal dens, beaches, and cold nearshore habitats North America 🦂 Sea Scorpion

Sea Scorpion Facts for Kids

Sea scorpions were extinct aquatic arthropods called eurypterids. They were not true scorpions, dinosaurs, fish, or reptiles. Some lived in seas, while others lived in brackish or freshwater habitats. A few giant kinds became among the largest arthropods ever known.

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Carnivore Paleozoic seas, brackish waters, freshwater habitats, muddy bottoms, and coastal waterways Worldwide 🦎 Seymouria

Seymouria Facts for Kids

Seymouria was a sturdy reptiliomorph tetrapod that lived during the Early Permian. It was not a dinosaur, true reptile, or modern amphibian, although it combined amphibian-like ancestry with a strongly land-adapted adult skeleton. Robust limbs, well-formed wrists and ankles, and fossils from dry terrestrial deposits show that adults were capable walkers on land.

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Carnivore Early Permian dry floodplains, seasonal river margins, wooded lowlands, upland soils, and terrestrial habitats of North America and Europe North America, Europe 🦕 Shantungosaurus

Shantungosaurus Facts for Kids

Shantungosaurus was a gigantic duck-billed dinosaur from Late Cretaceous China. It was not a meat-eater and not a crested Lambeosaurus type, but it may have been the largest known hadrosaur. Shantungosaurus had a toothless beak at the front, hundreds of tiny chewing teeth in the jaws, a huge body, and fossils from Shandong Province.

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Herbivore Late Cretaceous Shandong floodplains, Wangshi Group habitats, Shandong Peninsula river systems, warm coastal lowlands, forested valleys, flowering plant zones, herd movement routes, and giant hadrosaur browsing ecosystems Asia 🌊 Shonisaurus

Shonisaurus Facts for Kids

Shonisaurus was a giant marine reptile from the Late Triassic Period. It was not a dinosaur, but an ichthyosaur, a group of ocean reptiles with streamlined bodies and flippers. Fossils from North America show that some ichthyosaurs grew to whale-like sizes in ancient seas.

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Carnivore Late Triassic oceans, seaways, and open marine habitats North America 🐻 Short-Faced Bear

Short-Faced Bear Facts for Kids

The short-faced bear was a giant Ice Age bear from North America. It was not a dinosaur, and it was not just a bigger version of a modern grizzly. Scientists study its bones, teeth, caves, and chemistry clues to understand whether it hunted, scavenged, ate plants, or did a mix of all three.

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Omnivore Ice Age open woodlands, grasslands, caves, valleys, plains, and mixed habitats North America 🦕 Shunosaurus

Shunosaurus Facts for Kids

Shunosaurus was a sauropod dinosaur from Jurassic China. It was not one of the gigantic later sauropods, but it is one of the best-known early sauropods because several skeletons and skulls have been found. Shunosaurus is especially famous for a small bony club at the end of its tail, a rare surprise for a long-necked dinosaur.

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Herbivore Middle Jurassic Sichuan floodplains, Dashanpu fossil beds, Lower Shaximiao Formation habitats, river channels, lake margins, fern and conifer vegetation, warm humid lowlands, and early sauropod browsing ecosystems Asia 🐊 Simosuchus

Simosuchus Facts for Kids

Simosuchus was a small land-living crocodyliform from Late Cretaceous Madagascar. It was not a dinosaur or a modern crocodile. Its extremely short pug-like snout, leaf-shaped multicusped teeth, downward-tilted head, sturdy limbs, and extensive bony armor created one of the strangest body plans in the crocodile family tree. Its feeding anatomy strongly suggests that it ate mostly or entirely plants.

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Herbivore Late Cretaceous seasonal floodplains, dry woodlands, river channels, sandy lowlands, and semi-arid terrestrial habitats of northwestern Madagascar Africa 🐘 Sinomastodon

Sinomastodon Facts for Kids

Sinomastodon was an elephant-like proboscidean that lived across parts of Asia from the Late Miocene into the Early Pleistocene. It was not a mastodon from the genus Mammut, despite its name meaning Chinese mastodon. Its short lower jaw lacked permanent projecting tusks, while two upper tusks curved gently upward and bunodont molars crushed plant food.

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Herbivore Late Miocene to Early Pleistocene woodlands, forest edges, river valleys, wooded grasslands, subtropical lowlands, and tropical Asian habitats Asia 🦌 Sinomegaceros

Sinomegaceros Facts for Kids

Sinomegaceros was a genus of giant deer that lived across central and eastern Asia from the Late Pliocene into the Late Pleistocene. It was related to other giant deer such as Megaloceros, but its antlers had a distinctive broad, flattened brow tine near the base. Species varied greatly in size and antler shape, and ancient DNA suggests that eastern Sinomegaceros and western Megaloceros had a tangled evolutionary history that may have included interbreeding.

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Herbivore Late Pliocene and Pleistocene grasslands, open woodlands, steppe, river valleys, mountain basins, and cool temperate plains across central and eastern Asia Asia 🪽 Sinornithosaurus

Sinornithosaurus Facts for Kids

Sinornithosaurus was a small feathered dromaeosaurid dinosaur from Early Cretaceous China. It was not a modern bird, but it was close to the bird line and helps scientists understand how feathers spread through raptor dinosaurs. Some fossils preserve feather impressions, and its possible venomous bite was proposed in 2009 but later challenged.

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Carnivore Early Cretaceous Liaoning forests, Yixian Formation lake margins, Sihetun fossil beds, volcanic ash deposits, tree-rich wetlands, small prey habitats, Jehol Biota ecosystems, and feathered raptor environments Asia 🪽 Sinosauropteryx

Sinosauropteryx Facts for Kids

Sinosauropteryx was a small feathered dinosaur from Early Cretaceous China. It was not a modern bird, but it became world-famous because it was one of the first non-bird dinosaurs found with clear feather-like body covering. Its fossils even preserve color clues, including a reddish-brown body and a banded tail.

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Carnivore Early Cretaceous Liaoning lake forests, Yixian Formation and Jehol Biota habitats, volcanic ash fossil beds, tree-rich wetlands, small prey zones, fern and conifer margins, freshwater lake edges, and feathered dinosaur ecosystems Asia 🦒 Sivatherium

Sivatherium Facts for Kids

Sivatherium was a huge extinct giraffe relative from the late Neogene. It was not a dinosaur and not a moose, even though its heavy body and headgear can look moose-like in drawings. This giant giraffid had large ossicones on its head, a shorter neck than modern giraffes, and lived across parts of Africa and Asia.

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Herbivore Late Miocene to early Pleistocene African and Asian grasslands, open woodlands, shrublands, river valleys, Siwalik foothill habitats, browsing zones, savanna-like areas, and mixed feeding landscapes Africa, Asia 🐯 Smilodon

Smilodon Facts for Kids

Smilodon was a powerful saber-toothed cat from the Ice Age. It was not a dinosaur and not a true tiger, even though people often call it the saber-toothed tiger. Smilodon had huge upper canine teeth, strong front legs, and fossils famous from places such as La Brea Tar Pits.

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Carnivore Ice Age grasslands, woodlands, scrublands, open plains, and tar pit regions North America, South America 🕊️ Socorro Dove

Socorro Dove Facts for Kids

The Socorro Dove is an extinct-in-the-wild dove from Socorro Island, off western Mexico. It is not fully extinct because birds still survive in human care, but it has not been recorded in its native wild habitat since 1972. Conservation breeding and island restoration projects are trying to give this quiet dove a second wild chapter.

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Herbivore Socorro Island forests, native woodlands, volcanic slopes, shrublands, ravines, highland seasonal areas, and restored island habitats North America 🦖 Spinosaurus

Spinosaurus Facts for Kids

Spinosaurus was a giant meat-eating dinosaur from North Africa with a long crocodile-like snout, cone-shaped teeth, and a tall sail on its back. Scientists think it spent time around rivers and wetlands, making it one of the strangest famous predatory dinosaurs.

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Carnivore Cretaceous rivers, wetlands, and coastal floodplains Africa 🐘 Stegodon

Stegodon Facts for Kids

Stegodon was an extinct elephant relative that lived across Africa and Asia for millions of years. It was not a dinosaur and not exactly a modern elephant, though it was part of the proboscidean family tree. Stegodon is famous for its ridged molars, long tusks, giant mainland species, and dwarf island species such as Stegodon florensis on Flores.

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Herbivore Late Miocene to Late Pleistocene African and Asian forests, South Asian plains, Southeast Asian islands, East Asian woodlands, Flores island habitats, river valleys, grassland edges, and mixed browsing-grazing ecosystems Africa, Asia 🦕 Stegosaurus

Stegosaurus Facts for Kids

Stegosaurus was a plant-eating dinosaur with a small head, sturdy body, tall back plates, and a spiky tail. It lived during the Late Jurassic Period, long before T. rex, and its fossils help scientists study one of the most recognizable armored dinosaurs.

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Herbivore Jurassic floodplains and open woodland edges North America, Europe 🌊 Steller's Sea Cow

Steller's Sea Cow Facts for Kids

Steller's Sea Cow was a giant marine mammal that lived around the Commander Islands in the cold Bering Sea. It was not a dinosaur, seal, or whale, but a sirenian related to dugongs and manatees. Europeans first described it in 1741, and it was hunted to extinction by 1768.

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Herbivore Cold Bering Sea coasts, kelp forests, shallow rocky waters, Commander Islands shorelines, and North Pacific marine habitats Asia, North America 🕵️ Steneosaurus

Steneosaurus Facts for Kids

Steneosaurus is a famous historical name once used for many long-snouted Jurassic crocodyliforms. Modern researchers found that those animals did not form one natural genus, and the poorly preserved type specimen could not be diagnosed clearly. Most recent studies therefore treat Steneosaurus as an invalid or doubtful genus and place its former species into better-defined genera such as Macrospondylus, Charitomenosuchus, Neosteneosaurus, and others.

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Carnivore Jurassic coastal seas, lagoons, estuaries, brackish channels, rivers, and shallow marine environments represented by the many former species Europe 🐂 Steppe Bison

Steppe Bison Facts for Kids

The steppe bison was an extinct Ice Age bison that lived across Eurasia and North America. It was not a dinosaur, but a hoofed mammal related to modern bison. Steppe bison had large horns, a heavy body, and lived in open mammoth-steppe habitats with mammoths, horses, wolves, and big cats.

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Herbivore Ice Age mammoth steppe, cold grasslands, open plains, river valleys, tundra edges, and Beringian habitats Europe, Asia, North America 🦈 Stethacanthus

Stethacanthus Facts for Kids

Stethacanthus was a shark-like prehistoric fish that lived before and during the Carboniferous Period. It was not a dinosaur, but a cartilaginous fish famous for a strange flat dorsal fin on mature males. That fin looked a bit like an ironing board covered with tiny tooth-like spikes.

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Carnivore Devonian and Carboniferous oceans, reefs, shallow seas, and coastal waters North America, Europe, Asia, Australia 🐢 Stupendemys

Stupendemys Facts for Kids

Stupendemys was an enormous extinct freshwater turtle from Miocene South America. It was not a dinosaur and not a sea turtle. This giant side-necked turtle lived in northern South American wetlands, had a shell that could reach several metres across, and some males had horn-like structures on the front of the shell.

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Omnivore Miocene South American wetlands, freshwater rivers, lakes, floodplains, swamp forests, muddy banks, Urumaco waterways, Tatacoa region habitats, and turtle nesting areas South America 🦕 Styracosaurus

Styracosaurus Facts for Kids

Styracosaurus was a horned plant-eating dinosaur from Late Cretaceous North America. It had a large nose horn, a parrot-like beak, and a dramatic frill with long spikes around the edge, making it one of the spikiest ceratopsians.

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Herbivore Cretaceous floodplains, forests, and open woodland edges North America 🦖 Suchomimus

Suchomimus Facts for Kids

Suchomimus was a large meat-eating dinosaur from Early Cretaceous Niger. It was not a crocodile, even though its name means crocodile mimic. Suchomimus belonged to the spinosaurid family and had a long narrow skull, cone-shaped teeth, powerful arms, huge thumb claws, and a body suited for catching fish and other prey near ancient rivers.

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Carnivore Early Cretaceous Niger floodplains, Elrhaz Formation habitats, Gadoufaoua river systems, freshwater channels, fish-rich waterways, muddy banks, tropical seasonal plains, and spinosaurid predator ecosystems Africa 🦕 Supersaurus

Supersaurus Facts for Kids

Supersaurus was an enormous long-necked sauropod dinosaur from Late Jurassic North America. It was not a meat-eater and not the same as Diplodocus, though it was a diplodocid relative. Supersaurus is famous because some estimates suggest it may have reached about 130 feet long, making it one of the longest dinosaurs ever discovered.

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Herbivore Late Jurassic Morrison Formation floodplains, western North American river valleys, Dry Mesa Quarry region, semi-arid seasonal plains, conifer woodlands, fern and horsetail ground cover, lake margins, and giant diplodocid browsing ecosystems North America 🦌 Synthetoceras

Synthetoceras Facts for Kids

Synthetoceras was an extinct hoofed mammal from the Late Miocene of North America. It was not a dinosaur, deer, antelope, or giraffe, though it had strange horn-like structures. This protoceratid had two horns above the eyes and, in males, a long Y-shaped horn on the snout, making it one of the oddest-looking herbivores of its time.

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Herbivore Late Miocene North American subtropical coastal plains, wet meadows, river margins, open woodlands, brushy grasslands, Texas fossil habitats, Nebraska fossil areas, and browsing wetlands North America 🐴 Syrian Wild Ass

Syrian Wild Ass Facts for Kids

The Syrian Wild Ass was a recently extinct wild equid from West Asia. It was not a donkey breed or a small horse, but an extinct subspecies of onager. This fast desert animal was one of the smallest wild horse relatives and lived in dry grasslands, deserts, and steppes before disappearing in the 1920s.

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Herbivore West Asian deserts, semi-deserts, arid grasslands, mountain steppes, rocky plains, dry valleys, oasis edges, and open shrublands Asia 🦎 Tanystropheus

Tanystropheus Facts for Kids

Tanystropheus was a bizarre long-necked reptile that lived around coastal waters during the Middle Triassic. It was not a dinosaur. Its neck could be longer than its body and tail combined, yet it contained only 13 extremely stretched vertebrae. Fossils show that large and small species lived together while hunting different kinds of prey.

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Carnivore Middle Triassic coastal lagoons, shallow marine waters, rocky shorelines, warm bays, reef margins, and nearshore habitats around ancient Europe and western Asia Europe, Asia 🪽 Tapejara

Tapejara Facts for Kids

Tapejara was an extinct pterosaur from Early Cretaceous Brazil. It was not a dinosaur, but a flying reptile with wings, a toothless beak, and a dramatic head crest. Scientists still study its lifestyle, including what it ate and how its crest may have been used.

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Omnivore Early Cretaceous lagoons, forests, rocky shores, and coastal wetlands South America 🦖 Tarbosaurus

Tarbosaurus Facts for Kids

Tarbosaurus was a giant meat-eating dinosaur from Late Cretaceous Asia. It was not T. rex, but it was a close tyrannosaurid relative from Mongolia and China. With powerful jaws, sharp teeth, strong legs, and tiny two-fingered arms, Tarbosaurus was one of the top predators of its ecosystem.

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Carnivore Late Cretaceous Mongolian floodplains, Nemegt Formation habitats, Gobi Desert fossil beds, river channels, humid woodland patches, sandy bars, giant herbivore routes, and Asian tyrannosaur predator territories Asia 🐾 Tasmanian Tiger

Tasmanian Tiger Facts for Kids

The Tasmanian tiger, also called the thylacine, was a recently extinct carnivorous marsupial. It was not a tiger and not a wolf, even though its striped back and dog-like body gave it both nicknames. It once lived in mainland Australia and New Guinea, but survived into modern times on Tasmania.

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Carnivore Tasmanian forests, grasslands, wetlands, scrublands, coastal heaths, and woodland edges Oceania 🐬 Temnodontosaurus

Temnodontosaurus Facts for Kids

Temnodontosaurus was a large predatory ichthyosaur that lived in European seas during the Early Jurassic. It had a streamlined body, four flippers, powerful jaws, cutting-edged teeth, and enormous eyes supported by bony rings. A famous fossil found by Joseph and Mary Anning became the first ichthyosaur described in scientific literature and was later identified as Temnodontosaurus.

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Carnivore Early Jurassic open seas, offshore marine basins, coastal waters, deep channels, ammonite-rich oceans, and muddy seafloors around ancient Europe Europe 🪽 Teratornis

Teratornis Facts for Kids

Teratornis was a giant extinct flying bird from the Ice Age. It was not a dinosaur and not a pterosaur. The best-known species, Teratornis merriami, looked a bit like a huge condor with a hooked beak, broad wings, and strong soaring skills. Many fossils have been found at the La Brea Tar Pits in Los Angeles.

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Carnivore Pleistocene western North American open grasslands, scrublands, savanna-like habitats, tar pit areas, cliffs, thermal-rich skies, and Ice Age scavenger ecosystems North America 🪽 Thalassodromeus

Thalassodromeus Facts for Kids

Thalassodromeus was a large, toothless pterosaur from the Early Cretaceous of Brazil. Its skull carried an enormous sail-like crest crossed by grooves for blood vessels, while its strong, blade-shaped jaws could open widely. Its name means sea runner because scientists first imagined it skimming for fish, but later studies challenged that idea and suggest it may have hunted more generally on land or near water.

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Carnivore Early Cretaceous coastal plains, lagoons, river margins, warm floodplains, dry ground, and shoreline habitats of the Romualdo Formation South America 🦕 Therizinosaurus

Therizinosaurus Facts for Kids

Therizinosaurus was a strange theropod dinosaur from Late Cretaceous Asia with enormous claws, long arms, a bulky body, and a small head. Even though it belonged to a group related to many meat-eating dinosaurs, scientists think Therizinosaurus mostly ate plants.

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Herbivore Cretaceous forests, floodplains, and scrubby woodland edges Asia 🐾 Thrinaxodon

Thrinaxodon Facts for Kids

Thrinaxodon was a small meat-eating cynodont that lived shortly after the end-Permian mass extinction. It was not a dinosaur or a mammal, but it belonged to the therapsid branch that eventually produced mammals. Differently shaped teeth, a partly developed secondary palate, strong jaws, and direct fossil evidence of burrowing make it one of the best-known early mammal relatives.

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Carnivore Early Triassic seasonal floodplains, dry river valleys, burrow systems, sparse lowlands, and cool southern environments across Gondwana Africa, Antarctica 🦁 Thylacoleo

Thylacoleo Facts for Kids

Thylacoleo was an extinct Australian marsupial often called the marsupial lion. It was not a real lion and not a dinosaur. The best-known species, Thylacoleo carnifex, was Australia's largest known mammalian carnivore and may have ambushed big Pleistocene animals with powerful forelimbs, sharp claws, and slicing teeth.

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Carnivore Pleistocene Australian woodlands, scrublands, forests, river valleys, rocky shelters, caves, waterhole areas, and megafauna habitats Oceania 🐟 Tiktaalik

Tiktaalik Facts for Kids

Tiktaalik was an extinct lobe-finned fish from the Late Devonian Period. It was not a dinosaur, but a famous transitional fossil with fish features and some limb-like traits. Tiktaalik lived in shallow water and helps scientists study how some vertebrates moved toward life on land.

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Carnivore Devonian shallow streams, floodplains, wetlands, and muddy water channels North America 🐟 Titanichthys

Titanichthys Facts for Kids

Titanichthys was a giant armored fish that lived in Late Devonian seas. It belonged to the placoderms, an extinct group of early jawed vertebrates protected by bony plates around the head and front of the body. Unlike its powerful relative Dunkleosteus, Titanichthys had long, narrow jaw plates without sharp cutting edges, and research suggests that it probably swallowed plankton-rich water as a huge suspension feeder.

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Planktivore Late Devonian shallow seas, offshore marine waters, continental shelves, reef margins, oxygen-poor basins, and pelagic feeding grounds North America, Africa 🐦 Titanis

Titanis Facts for Kids

Titanis was a giant extinct flightless bird from North America. It was not a dinosaur and not an ostrich. Titanis walleri belonged to the terror bird family, a group that began in South America, and it became the only confirmed terror bird known from North America after moving north during the Great American Biotic Interchange.

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Carnivore Pliocene and early Pleistocene Florida habitats, Gulf coastal plains, river systems, open woodlands, wetlands, grasslands, Santa Fe River fossil sites, Texas fossil sites, and North American predator ecosystems North America 🐍 Titanoboa

Titanoboa Facts for Kids

Titanoboa was a gigantic extinct snake from Paleocene Colombia. It was not a dinosaur, because it lived after the non-bird dinosaurs disappeared. Titanoboa cerrejonensis is famous as the largest snake known to science, with estimates around 13 metres long and more than a ton in weight.

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Carnivore Paleocene Colombian tropical rainforest, Cerrejón Formation swamps, river channels, wetland forests, coal swamp habitats, warm waterways, and aquatic hunting areas South America 🦘 Toolache Wallaby

Toolache Wallaby Facts for Kids

The Toolache Wallaby was a recently extinct marsupial from southeastern Australia. It was not a kangaroo, though it was a close kangaroo-family relative. This elegant wallaby lived in grassy and scrubby habitats of South Australia and nearby regions, but hunting, habitat loss, and introduced predators pushed it to extinction in the 1900s.

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Herbivore Southeastern Australian grasslands, seasonally wet flats, scrublands, open woodlands, coastal plains, and grassy shelter areas Oceania 🦕 Torosaurus

Torosaurus Facts for Kids

Torosaurus was a huge horned dinosaur from Late Cretaceous North America. It looked a lot like Triceratops, but it is famous for its extra-long frill with large openings, called fenestrae. Some scientists have debated whether Torosaurus was its own dinosaur or a very old growth stage of Triceratops, so its identity is one of the great ceratopsian puzzles.

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Herbivore Late Cretaceous western North American floodplains, Hell Creek and Lance Formation habitats, open woodland edges, river valleys, fern and flowering plant zones, coastal plain lowlands, ceratopsian browsing routes, and Triceratops-relative ecosystems North America 🦖 Torvosaurus

Torvosaurus Facts for Kids

Torvosaurus was a large meat-eating dinosaur from the Late Jurassic Period. It was not T. rex and lived much earlier, alongside famous Jurassic dinosaurs such as Stegosaurus and giant sauropods. Torvosaurus was a megalosaurid theropod with a strong skull, sharp teeth, powerful arms, and fossils found in places including the USA, Portugal, and Germany.

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Carnivore Late Jurassic Morrison Formation floodplains, western North American river valleys, Lourinhã Formation coastal plains in Portugal, German Jurassic fossil localities, conifer woodlands, fern-covered ground, sauropod and stegosaur habitats, and megalosaurid predator territories North America,Europe 🦏 Toxodon

Toxodon Facts for Kids

Toxodon was a huge extinct South American mammal from the Ice Age. It was not a dinosaur, rhinoceros, or hippopotamus, even though its heavy body can look rhino-like in drawings. Toxodon belonged to Notoungulata, a vanished group of native South American hoofed mammals, and it became famous after Charles Darwin collected its fossils.

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Herbivore Late Pleistocene South American grasslands, wetlands, savannas, river floodplains, marsh edges, open woodlands, pampas, and mixed grazing-browsing habitats South America 🦕 Triceratops

Triceratops Facts for Kids

Triceratops was a large plant-eating dinosaur with three horns, a big bony frill, a beak, and a strong body. It lived in western North America near the end of the Cretaceous Period, around the same time as Tyrannosaurus rex.

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Herbivore Cretaceous plains and forest edges North America 🪲 Trilobite

Trilobite Facts for Kids

Trilobites were extinct marine arthropods that lived in ancient oceans for hundreds of millions of years. They were not dinosaurs, fish, or reptiles. Trilobites had hard outer shells, segmented bodies, and three lengthwise lobes that gave them their famous name.

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Varied Cambrian to Permian oceans, shallow seas, reefs, muddy seafloors, and deeper marine habitats Worldwide 🪽 Tropeognathus

Tropeognathus Facts for Kids

Tropeognathus was a large toothed pterosaur from Early Cretaceous Brazil. It was not a dinosaur, but a flying reptile with long wings, sharp teeth, and big keel-like crests on its jaws. Its fossils help scientists study fish-eating pterosaurs from the famous Araripe Basin.

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Carnivore Early Cretaceous lagoons, coastal waters, cliffs, and nearby islands South America 🌊 Tylosaurus

Tylosaurus Facts for Kids

Tylosaurus was a giant marine reptile from the Late Cretaceous Period. It was not a dinosaur, but a mosasaur related to lizards and snakes. Tylosaurus had a long body, powerful jaws, sharp teeth, flippers, and a pointed snout for hunting in ancient seas.

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Carnivore Late Cretaceous seaways, shallow seas, coastal waters, and open marine habitats North America 🦖 Tyrannosaurus Rex

Tyrannosaurus Rex Facts for Kids

Tyrannosaurus rex, often called T. rex, was a giant meat-eating dinosaur that lived near the end of the Cretaceous Period. It had a huge head, strong legs, sharp teeth, and one of the most famous fossil stories in the dinosaur world.

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Carnivore Cretaceous forests and floodplains North America 🦏 Uintatherium

Uintatherium Facts for Kids

Uintatherium was a giant extinct mammal from the Eocene. It was not a dinosaur, rhinoceros, or elephant. This strange plant eater had a heavy body, three pairs of bony skull knobs, saber-like upper canine teeth, and lived in warm forests long before humans existed.

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Herbivore Eocene North American forests, lake margins, river floodplains, warm woodlands, Uinta Formation habitats, Bridger Basin habitats, marsh edges, and lush browsing areas North America, Asia 🦖 Utahraptor

Utahraptor Facts for Kids

Utahraptor was a giant meat-eating dinosaur from Early Cretaceous Utah. It belonged to the dromaeosaurid family, the same sickle-clawed group as Velociraptor, but it was much larger. Fossils show a powerful predator with a huge curved claw on each second toe, strong legs, sharp teeth, and a long balancing tail.

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Carnivore Early Cretaceous floodplains, seasonal wetlands, river channels, muddy flats, open woodlands, and rocky landscapes of ancient Utah North America 🐦 Vegavis

Vegavis Facts for Kids

Vegavis was a foot-propelled diving bird that lived in Antarctica near the end of the Cretaceous Period. It was a true bird, not a non-bird dinosaur, and recent skull research supports a place among early waterfowl within the crown group containing all living birds. Unlike a duck, Vegavis had a long pointed beak suited to catching fish and small aquatic animals. As of 2026, scientists recognise three named species in the genus.

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Carnivore Late Cretaceous shallow seas, coastal waters, marine shelves, islands, and cool temperate forested shorelines of the Antarctic Peninsula Antarctica 🦖 Velociraptor

Velociraptor Facts for Kids

Velociraptor was a small feathered meat-eating dinosaur from Late Cretaceous Asia. Movie versions often make it too big, but the real Velociraptor was much smaller, quick, clever-looking, and armed with a famous curved claw on each foot.

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Carnivore Cretaceous deserts and semi-arid sand dunes Asia 🐦 Wake Island Rail

Wake Island Rail Facts for Kids

The Wake Island Rail was a small flightless bird that lived only on Wake Atoll in the Pacific Ocean. It was not a dinosaur and not a chicken, but a rail. This curious island bird lived in scrubby plants, nested on the ground, and disappeared during World War II after people on the island hunted it for food.

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Omnivore Wake Atoll scrublands, coral island thickets, ground vegetation, open sandy areas, nesting cover, Peale islet, and Pacific atoll habitats Oceania 🦏 Western Black Rhinoceros

Western Black Rhinoceros Facts for Kids

The Western Black Rhinoceros was a recently extinct subspecies of black rhinoceros from Africa. It was not a dinosaur, and it was not the same as every black rhino alive today. This browsing rhino once lived in parts of western and central Africa, but poaching pushed it to extinction, and the IUCN declared it extinct in 2011.

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Herbivore West and Central African savannas, scrublands, dry woodlands, bushlands, Cameroon habitats, and browsing areas Africa 🪱 Wiwaxia

Wiwaxia Facts for Kids

Wiwaxia was a small, soft-bodied animal that crawled across Cambrian seafloors more than 500 million years ago. Its back was protected by overlapping scale-like sclerites and two rows of long spines, while its underside had a broad slug-like foot. A tiny toothed feeding apparatus probably scraped algae and microbial films from the seafloor, but scientists still debate whether Wiwaxia was closer to early molluscs, annelid worms, or their shared relatives.

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Herbivore Middle Cambrian muddy seafloors, microbial mats, sponge communities, quiet offshore shelf habitats, and low areas above soft marine sediment North America 🐍 Wonambi

Wonambi Facts for Kids

Wonambi was a giant extinct snake from ancient Australia. It was not a dinosaur and not a python, even though it lived in Australia and looked snake-like in a familiar way. Wonambi belonged to an old snake family called Madtsoiidae and was a powerful constrictor that lived during the Pliocene and Pleistocene.

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Carnivore Pleistocene Australian caves, woodlands, scrublands, forests, rocky shelters, Naracoorte fossil sites, waterhole edges, and megafauna habitats Oceania 🦣 Woolly Mammoth

Woolly Mammoth Facts for Kids

The woolly mammoth was an Ice Age elephant relative with long shaggy hair, a thick fat layer, small ears, a trunk, and huge curved tusks. It lived in cold northern habitats across Eurasia and North America. The last woolly mammoths survived on islands until about 4,000 years ago.

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Herbivore Ice Age steppe-tundra, cold grasslands, open plains, river valleys, and Arctic island habitats Europe, Asia, North America 🦏 Woolly Rhinoceros

Woolly Rhinoceros Facts for Kids

The woolly rhinoceros was an extinct Ice Age mammal with thick fur, a large front horn, a smaller nose horn, and a sturdy body built for cold open habitats. It lived across northern Eurasia in steppe-tundra landscapes with mammoths, bison, reindeer, and other Ice Age animals.

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Herbivore Ice Age steppe-tundra, cold grasslands, open plains, river valleys, and dry shrublands Europe, Asia 🦕 Wuerhosaurus

Wuerhosaurus Facts for Kids

Wuerhosaurus was a plant-eating stegosaur from Early Cretaceous China. It lived later than famous Jurassic stegosaurs such as Stegosaurus and is known from incomplete skeletons found in Xinjiang and Inner Mongolia. Its fossils show a broad-bodied dinosaur with bony back plates, strong limbs, and a tail that likely carried defensive spikes.

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Herbivore Early Cretaceous inland basins, floodplains, river valleys, open woodlands, fern fields, shrublands, and seasonally dry habitats of northern China Asia 🐟 Xiphactinus

Xiphactinus Facts for Kids

Xiphactinus was a large predatory fish from the Late Cretaceous Period. It was not a dinosaur, shark, or marine reptile, but a huge bony fish with sharp teeth, a powerful body, and fossils famous from the ancient Western Interior Seaway of North America.

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Carnivore Late Cretaceous seaways, shallow seas, coastal waters, and open marine habitats North America 🐾 Yallara

Yallara Facts for Kids

Yallara was another name for the Lesser Bilby, a small extinct rabbit-eared marsupial from central Australian deserts. It was not a rabbit and not a mouse, even though it had long ears and a tiny body. This shy burrower survived into the 1900s, with Aboriginal memories suggesting it may have lasted longer than scientists directly recorded.

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Omnivore Central Australian deserts, arid plains, sandy dunes, stony desert country, shrublands, spinifex areas, burrow sites, and semi-arid habitats Oceania 🪶 Yutyrannus

Yutyrannus Facts for Kids

Yutyrannus was a giant feathered meat-eating dinosaur from Early Cretaceous China. It was an early tyrannosauroid relative of later giants such as Tyrannosaurus rex, but it had longer arms with three-fingered hands. Three nearly complete skeletons preserve long filament-like feathers, making Yutyrannus one of the clearest examples of a very large fluffy dinosaur.

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Carnivore Cool Early Cretaceous forests, lake margins, volcanic landscapes, wooded floodplains, misty valleys, and the Yixian Formation ecosystem of northeastern China Asia 🦕 Zuniceratops

Zuniceratops Facts for Kids

Zuniceratops was a small horned dinosaur that lived in what is now New Mexico during the Late Cretaceous, roughly 90 million years ago. It had two noticeable horns above its eyes, a beak for cropping plants, and a broad frill, but no large horn on its nose. Its mix of early and advanced features helps scientists study how famous horned dinosaurs evolved.

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Herbivore Late Cretaceous floodplains, river channels, humid lowlands, forest edges, coastal plain habitats, and vegetated landscapes of ancient New Mexico North America 🦣 Zygomaturus

Zygomaturus Facts for Kids

Zygomaturus was a giant extinct marsupial from ancient Australia. It was not a dinosaur and not a rhinoceros, though people sometimes compare its bulky body with a hippo or rhino. Zygomaturus trilobus was a large plant-eater related to Diprotodon, wombats, and other diprotodontid marsupials.

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Herbivore Pleistocene Australian wetlands, river edges, swampy woodlands, open forests, grasslands, lakeside areas, floodplains, and browsing habitats Oceania