Frogs (order Anura) and salamanders (order Urodela/Caudata) both belong to the class Amphibia. Amphibians are ectothermic vertebrates that typically have a dual life — aquatic larval stage and terrestrial adult stage. They breathe through lungs, moist skin, and gills (in larvae). Reptiles are fully terrestrial with dry, scaly skin and amniotic eggs.