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Overview of Amphibians

By Brent R. Whitaker, MS, DVM, Vice President of Biological Programs, National Aquarium

The class Amphibia is composed of three orders: Anura (frogs and toads), the largest with >3,500 species; Caudata (salamanders, newts, and sirens) with ~375 species; and Gymnophiona (caecilians) with ~160 species.

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