Great Black Wasp

Facts, Identification & Control

Appearance

The great black wasp is a very large wasp species, as its name infers. This wasp is black, mono-colored and without colored stripes, spots or other noticeable patterns on the body. Adult females of the species reach about 1-1 ½ inches long and are a little larger than the males.

Behavior, Diet & Habits

The commonly considered distribution of this wasp is the eastern 2/3 of the U.S. Great black wasps are not aggressive due to the fact they do not have a colony to defend and are categorized as solitary wasps. Although their common name sounds intimidating, their name comes from the size of the insect, rather than the aggressiveness of the insect. In fact, male adults do not have the ability to sting and their only purpose in nature is to mate. Females can sting, but only do so if their nest is threatened. Great black wasps are subterranean wasps, meaning they live underground and construct small underground nests where they care for their offspring. These insects gather prey, most commonly grasshoppers, locusts, cicadas and other large, “fleshy” insects that they feed to their immature offspring. In areas where this insect lives, they can be seen flying with paralyzed insect prey in their mouth and stuffing the paralyzed insect into the underground nest. With all the hunting they do, it is necessary for the female adults to consume lots of high-energy food. Therefore, their primary food source is nectar from surrounding flowers. Their preferred habitat is areas where prey is located, like meadows, pastures and residential areas where gardens, landscaping plants and flowers are found.

More Information

Since the great black wasp is not aggressive and is an important predator of harmful insects and a good pollinator of flowering plants, there is no reason for the homeowner to control them. However, if their presence alarms you, slowly and carefully move away from the wasp and contact your pest management professional for his advice and recommendations. The great black wasp is also known as the Katydid Hunter and Steel-blue Cricket Hunter.