Amphibians
Amphibians are cold-blooded vertebrates with moist, permeable skin that usually start life in water as larvae and transform into air-breathing adults. That thin skin makes them sensitive to pollution, disease and climate, and amphibians are the most threatened class of vertebrates. Sizes run from thumbnail-sized frogs to giant salamanders more than a meter long.
10 amphibians, grouped by taxonomic order. Tap an animal for full facts.
Anura
| Animal | Lifespan | Weight | Top speed | Status |
|---|---|---|---|---|
| American Bullfrog Lithobates catesbeianus |
7–10 years | 300–500 g (0.7–1.1 lb) | — | LC |
| American Toad Anaxyrus americanus |
2–10 years | about 20–60 g (0.7–2 oz) | — | LC |
| Cane Toad Rhinella marina |
10–15 years | 0.2–1.3 kg (0.4–2.9 lb) | — | LC |
| Golden Poison Frog Phyllobates terribilis |
around 10 years | up to about 30 g (1 oz) | — | EN |
| Goliath Frog Conraua goliath |
up to about 15 years | 0.6–3.3 kg (1.3–7.2 lb) | — | EN |
| Red-Eyed Tree Frog Agalychnis callidryas |
about 5 years | 6–15 g (0.2–0.5 oz) | — | LC |
Caudata
| Animal | Lifespan | Weight | Top speed | Status |
|---|---|---|---|---|
| Axolotl Ambystoma mexicanum |
10–15 years | 60–225 g (2–8 oz) | — | CR |
| Chinese Giant Salamander Andrias davidianus |
up to 50–60 years | 25–30 kg (55–66 lb) | — | CR |
| Eastern Newt Notophthalmus viridescens |
12–15 years | about 2–4 g (0.07–0.14 oz) | — | LC |
| Fire Salamander Salamandra salamandra |
10–20 years | about 20–40 g (0.7–1.4 oz) | — | VU |
Rankings
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