A predator is normally an animal that feeds on its prey. Like the predator, for example a snake, feeds on its prey, a mouse. A predator is the hunter, and the prey is the one, sadly, eaten. Or:...
Some animals are both predators and prey for other nastier predators, A good example is the Grizzly Bear. It is now a top predator, but was once prey for the Short Faced Bear, an animal that died out...