Juvenile crocodiles eat crustaceans, insects and small fish. A four metre crocodile has the strength to attack and drown a small horse. A crocodile can not cut its food with its teeth as they are designed to clamp. So the crocodile has to rip large prey apart by doing the 'crocodile death roll' or 'head shake'. For example, the Australian Freshwater crocodile digs a hole in the sandy riverbank during the dry season while American Alligators and Estuarine Crocodiles build mounds of dirt and vegetation, nesting in the summer rains.
Crocodiles rely on their environment to heat their bodies.
That's why crocodiles are only found in the tropics. A colloquial term for Australian crocodiles is 'gators'. This is why we have locations such as 'Alligator Creek' and 'Alligator River' in Australia. Chinese and American Alligators are members of the Crocodilian family, but there are no wild Australian Alligators. Both species of Australian crocodile have salt glands in their tongue.