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 40
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adult African clawed toad amplexus animals aquatic Asian painted frog axolotl back legs body forward body shape bones breeding bullfrog burrow caecilians camouflage cloaca color helps courtship crested newt dart frogs develop disks enemies Eurasian common toad European common frog eyes female fingers and toes fire salamander fossil frog from South frog's frogs and toads frogs from Australia front and hind front legs fully webbed feet gills gland habitats hatch head hind legs Ichthyostega insects land larvae leaf litter leap leaves lives in water look lungless salamander male frogs male's mantella mating embrace mouth move Newt larva newts and salamanders numbers pads palmate newt panther toad parotoid poison-dart frogs poisonous ponds predators prey push sharp-ribbed newt sirens skeleton skin skunk frog snakes South America species sticky stripes swim tadpole tail tiger salamander tomato frogs Triadobatrachus tungara frog vertebrae walk White's tree frogs