Photographed in full color . Take a close-up look at the first vertebrates
to conquer land--from familiar bullfrogs and toads to unusual legless
caecilians and eel-like sirens. Explore their anatomy, behavior, and pivotal
place on the evolutionary time line.
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What is an amphibian?
The importance of water
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adult African clawed toad amplexus animals Asian painted frog axolotl back legs body shape bones breeding bullfrog burrow caecilians camouflage cloaca color helps common toad crested newt dart frogs develop disks enemies Eurasian common toad European common frog eyes female fingers and toes fire salamander foot forward fossil frog from South frog's froglets frogs and toads frogs from Australia front legs fully webbed feet gland habitats hatch head hind legs insects land larvae leaf litter leap leaves lives in water look lungless salamander male frogs mantella mating embrace mouth move Newt larva newts and salamanders Northern leopard frog numbers Orange striped newt pads palmate newt parotoid pattern Poison-dart frogs poisonous ponds predators prey push red-eyed tree frog sharp-ribbed newt sirens skeleton skin skunk frog snakes South America species sticky swim tadpole tail tiger salamander Triadobatrachus vertebrae walk White's tree frogs wood louse