Great Black Wasps are part of the Digger Wasp family, creating burrows in the soil. Adult female wasps hunt for insects after laying fertilized eggs in this underground nest. Each egg laid in a tunnel and a Katydid or Cricket is placed next to it. Once the egg hatches, the emerging larva has an immediate food source and will devour the insect as it grows and develops. Their juvenile diet helps keep the katydid, cricket and grasshopper populations under control.
Adult Great Black Wasps may look mean, but they are disinterested in humans and are not bothersome, though they can sting if mishandled or threatened.