They usually have long, lizard-like bodies and most have two or four legs. They are very much like frogs because they spend their lives in the water or wet environments. To live in water, salamanders need gills. Some salamanders are aquatic and never lose their gills, but some adult salamanders lose their gills and live on land. Reptiles Reptiles vary in size from very small to very large, and they have scaly skin.
Most reptiles live on land all their lives.
Crocodiles, alligators, and some snakes and turtles are the exception. Reptile development is different than amphibians'. Instead of going through metamorphosis, baby reptiles are miniature versions of their parents when they hatch. The main categories of reptiles are crocodiles , lizards , snakes, and turtles . Some examples of lizards are iguanas, geckos, and chameleons.