Reptiles, a diverse team of air-respiration vertebrates, are characterised by their scaly african grey parrots, pores and skin, amniotic eggs, and ectothermic (chilly-blooded) metabolism. They can be usually classified into four living orders: Crocodilia (crocodiles and alligators), Sphenodontia (tuataras), Squamata (lizards and snakes), and Testud