Reptiles are found all over the world, except in very cold areas. The greatest number and variety are in the hot, humid tropics. Snakes and lizards live in many different kinds of places. They can live on land, in trees, in underground tunnels, or in water. Most turtles live in water but spend some time on land. Tortoises live only on land. Alligators and crocodiles spend most of their time in water, but they can make short trips on land.
