A predator is an animal that hunts, catches, and eats other animals. For example, a spider eating a fly caught at its web is a predator, or a pack of lions eating a buffalo. The animals that the predator hunts are called prey. Predators mostly do not eat other predators. It has also been suggested that they know it may transmit disease. A "top predator" or "apex predator" is one that is not the prey of other predators.