Crocodiles live in swamps or on river banks and catch their prey in the water.
They have flattened bodies and tails, short legs, and powerful jaws. The eyes, ears, and nostrils are located near the top of the head and are exposed when the crocodile floats on the surface of the water. The ears and nostrils have valves that close when the animal is submerged. Most crocodiles are more aggressive than the related alligators . The snouts of most crocodiles are narrower than those of alligators.