organisms that reduce pest numbers, normally predators or parasites of pests. Frequently insects and bacteria but may be fungi, nematodes, etc.
Contribute positively by their habits, for example, by predating on pest organisms
Organisms inhabiting the Great Lakes-St. Lawrence Basin Ecosystem that are not known to threaten ecosystem integrity or otherwise have any harmful impacts on the Ecosystem or the beneficial uses of ecosystem resources.
Organisms used to control a pest population. These include
Birds, parasites, nematodes or other organisms that aid in controlling pests.