The males are very aggressive but don't sting ,they gaurd the nest (a hole in the ground ) until the female returns with a cicada which is not dead but paralized. She puts the cicada in the hole and lays eggs on it when they hatch they eat the cicada. The female does however sting but not near as aggressive as the male. BTW I don't know how to tell the diff between male and female so the lawn gets alittle long where there holes are .lol