The term wasp is typically defined as any insect of the order Hymenoptera and suborderApocrita that is neither a bee nor an ant. Almost every pest insect species has at least one wasp species that preys upon it or parasitizes it, making wasps critically important in natural control of their numbers, or natural biocontrol. Parasitic wasps are increasingly used in agricultural pest control as they prey mostly on pest insects and have little impact on crops.
Wasps build their nests in a variety of places, often choosing sunny spots. Nests are commonly located in holes underground, along riverbanks or small hillocks, attached to the side of walls, trees or plants, or underneath floors or eaves of houses. Wasp nests are most easily found on sunny days at dawn or dusk as the low light levels make it easier to spot the Wasps flying in and out of their nests. Wasps will attack and sting humans, particularly if threatened, so care should be taken around Wasps and their nests. Wasp nests found in dangerous places (such as in houses or in commonly used public spaces) should be reported to the local council or pest control service for removal.