Reptiles, a various group of air-respiration vertebrates, are characterised by their scaly skin, amniotic eggs, and ectothermic (cold-blooded) metabolism. These here are ordinarily categorized into four living orders: Crocodilia (crocodiles and alligators), Sphenodontia (tuataras), Squamata (lizards and snakes), and Testudines (turtles and tortoise