Reptiles, a diverse team of air-respiratory vertebrates, are characterized by their scaly skin, amniotic eggs, and ectothermic (cold-blooded) metabolism. They are really customarily categorized into 4 dwelling orders: Crocodilia (crocodiles and alligators), Sphenodontia (tuataras), Squamata (lizards and snakes), and Testudines (turtles and tortoise