Land, sea, and in between. Do a snake, a sea turtle, and an alligator have anything in common? -- Meet the reptiles : what kinds of animals are reptiles? -- Habitats and food. Where do reptiles live? The big truth! Reptiles in peril -- Why are some reptile species in danger of dying out? -- Communication and reproduction. How do reptiles communicate with each other? -- Reptiles and people -- What should you do if you want to keep a reptile as a pet?.