Amphibians: Class Amphibia

Amphibians (class Amphibia), such as frogs, toads, salamanders, newts, and gymnophiona, are cold-blooded animals that metamorphose from a juvenile, water-breathing form to an adult, air-breathing form. Typically, amphibians have four limbs. Unlike other land animals (amniotes), amphibians lay eggs in water, as their fish ancestors did. Amphibians are superficially similar to reptiles.

Classification

• Order Anura: 5,602 species of frogs and toads
• Order Caudata: 571 species of salmanaders and newts
• Order Gymnophiona: 174 species of caecilians