Examples: Frogs, toads, salamanders
Description: Amphibians were the first vertebrates to emerge onto the land. They still lay their eggs into water and most have an aquatic larval stage. The adults have air-breathing lungs but can also breathe underwater through their skin. They are cold-blooded and need to keep their skin moist. Amphibians have tiny teeth or none at all, but often have a large muscular tongue that can be used to catch prey.