Beneficial insects are divided into two groups, parasites and predators. A predator is an organism that, during its development, consumes more than one prey individual. Parasites can be further divided into parasites and parasitoids. A parasite is an organism that lives in or on the body of its host without killing the host, but usually debilitating the host to some extent. A parasitoid, on the other hand, is an organism that, during its development, lives in or on the body of a single host individual, eventually killing that individual.