of an organism for the sake of the nutrients making up its body.

Predators in particular practice predation, though so can also . See also simply .

Predators include especially animals (e.g., secondary consumers or tertiary consumers, etc.), particularly protozoa, , and also certain kinds of free-living bacteria (e.g., ) and also .

Whether a parasite is also a predator depends on whether the parasite kills its in order to consume it, e.g., see botulinum toxin, versus inadvertently killing or not killing at all.