Reptiles, a diverse group of air-respiratory vertebrates, are characterized by their scaly skin, amniotic eggs, and ectothermic (chilly-blooded) website metabolism. They may be usually classified into 4 dwelling orders: Crocodilia (crocodiles and alligators), Sphenodontia (tuataras), Squamata (lizards and snakes), and Testudines (turtles and tortoi