The noble duck.
predator; carnivore
When an animal kills another animal, the animal that kills that animal is called the predator, while the eaten is called the prey. Let's use a bird and a worm for example, the bird is the predator because it eats the worm, and the worm is the prey because it gets eaten.
crocodiles
at least 30 kills
Predator
pest
A tiger.
A barracuda
Another animal.
Usually when an animal kills another animal it eats the body but it is possible that an animal could kill another animal and the dead animal's body could fall into a small stream or pond where it could decompose and pollute the water.
bears