They hunt for other animals or eggs, which they swallow whole. To move, many snakes bend themselves from side to side, pushing off rocks or bumps in the ground. To hunt, some snakes are armed with fangs which they sink into their victim and inject a deadly venom. Others slowly suffocate their meal by tightly coiling around it. The last group of reptiles are turtles.
Turtles are the only living reptiles with shells.
Most turtle shells are made of an inner layer of bony plates and an outer layer of scales. The bony plates are joined to the skeleton. Turtles don't have teeth, so they use their sharp-edged jaws to tear at the plants and animals they eat.