Axolotls are unusual aquatic salamanders from Mexico. They keep feathery gills as adults, live underwater, and are famous for being able to regrow lost limbs and other body parts.

Bullfrogs are large frogs with big mouths, strong legs, loud calls, and a love for ponds, lakes, marshes, and slow streams. They are famous for deep booming calls that can sound like a bull saying hello from the water.

Caecilians are unusual amphibians with long, limbless bodies that can look like worms or snakes. Many live underground in warm, moist soil, where they use strong heads, ringed bodies, and tiny sensory tentacles to explore.

The Common Toad, Bufo bufo, is a sturdy amphibian native to much of Europe and parts of western Asia. It has dry-looking warty skin, copper or golden eyes with horizontal pupils, short legs, and large poison glands behind the eyes. Common Toads usually spend the year on land in woodland, gardens, hedges, and fields, returning to traditional ponds in spring to breed and lay long strings of eggs.

Frogs and toads are tailless amphibians in the order Anura. More than 8,000 species are recognized, making them the largest amphibian group. Frogs live on every continent except Antarctica and occupy rainforest canopies, ponds, deserts, mountains, underground burrows, fast streams, and even brackish wetlands. Adults usually have short bodies, powerful hind legs, moist glandular skin, large eyes, and no tail, but their size, shape, color, reproduction, and life cycle vary astonishingly.

Glass frogs are small tropical tree frogs from Central and South America. Many are bright green on top but have translucent bellies, so you may be able to see organs like the heart through the skin.

Hellbenders are giant aquatic salamanders from cool, clean streams in the eastern United States. They have flat bodies, wrinkly skin folds, tiny eyes, and a secretive life under large rocks.

The common mudpuppy is a large aquatic salamander from lakes, rivers, streams, and ponds in eastern North America. Its scientific name is Necturus maculosus. It spends its entire life in water and keeps a striking set of reddish external gills even after reaching adulthood.

The natterjack toad is a small European amphibian with a thin yellow line down its back. Its short legs give it a quick, scurrying run, and male natterjacks make remarkably loud calls on warm spring and summer nights. These unusual toads need open sandy ground and sunny, shallow pools, so protecting both land and water is essential for their survival.

Newts are small amphibians related to salamanders. Many newts spend part of life in water and part on land, with long tails, moist skin, tiny legs, and a life cycle that can include eggs, larvae, and young newts called efts.

The olm is a pale, slender salamander that spends its entire life in the cold underground waters of Europe’s Dinaric Karst. It has tiny eyes covered by skin, feathery red gills, and senses specially tuned for a world without sunlight. Sometimes called the “human fish” or “baby dragon,” this rare amphibian is neither a fish nor a dragon—it is one of Earth’s most remarkable cave animals.

Poison dart frogs are tiny, colorful amphibians that live in rainforests of Central and South America. Their bright colors warn predators that they may be poisonous, so these frogs are beautiful but should never be touched in the wild.

Red-eyed tree frogs are colorful amphibians from Central American rainforests. They are famous for bright red eyes, green bodies, orange feet, sticky toe pads, and eggs laid on leaves above water.

Salamanders are moist-skinned amphibians with long bodies, tails, and short legs. Some live in water, some live on land, and many hide in damp places such as forests, streams, logs, and leaf litter.

Toads are amphibians closely related to frogs. Many have dry-looking bumpy skin, short strong bodies, poison glands for protection, and a helpful appetite for insects, making them important little hunters in gardens, forests, and wetlands.

Tree frogs are small amphibians known for climbing, calling, jumping, and gripping leaves with sticky toe pads. Many live in trees or bushes near water, where they lay eggs and begin life as tadpoles.