amphibians library

Amphibians are cold-blooded animals that usually split their time between using their lungs on land and breathing with gills underwater. Learn about the three groups of amphibians which include frogs and toads, newts and salamanders and caecilians.

How Frogs Work

Featured Article: How Frogs Work

Frogs have been around for about 200 million years. In that time, they've adapted to their changing surroundings to ensure their survival. How have they changed, and what's the difference between frogs and toads, anyway? See more »

How Frogs Work

How Frogs Work

Frogs have been around for about 200 million years. In that time, they've adapted to their changing surroundings to ensure their survival. How have they changed, and what's the difference between frogs and toads, anyway?

See more »
Amphibians

Amphibians

Amphibian, one of a large class of cold-blooded vertebrates (animals with backbones).

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Axolotl

Axolotl

Axolotl, a Mexican salamander that retains most of its larval characteristics, but which matures sexually and is able to reproduce.

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Frog

Frog

Frog, a small tailless amphibian. Scientifically, there is no distinction between frogs and toads.

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Mud Puppy

Mud Puppy

Mud Puppy, a salamander that lives in lakes and rivers in the eastern United States.

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Newt

Newt

Newt, a salamander found in or near freshwater in North America, Europe, Asia, and North Africa.

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Salamander

Salamander

Salamander, a tailed amphibian. Salamanders are cold-blooded animals (their temperature changes with that of their surroundings).

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Spadefoot Toad

Spadefoot Toad

Spadefoot Toad, the common name for a family of amphibians. Spadefoot toads are widely distributed over Europe, southern Asia, northwest Africa, and North America.

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Surinam Toad

Surinam Toad

Surinam Toad, a brownish-black, tongueless amphibian found primarily in the Amazon and Orinoco rivers of South America.

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Toad

Toad

Toad, a small, tailless amphibian. Scientifically, there is no distinction between toads and frogs.

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Tree Frog

Tree Frog

Tree Frog, or Tree Toad, any of several kinds of climbing frogs or toads. Most live in trees, but some inhabit smaller plants, and a few species are ground-dwellers.

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