We had a bumble bee nest in the ground in our backyard. Slaughtered a lot of them off the back porch with my sons automatic airsoft gun. With the colored airsoft bb's they were like tracers when the Bumble Bees were hovering. Finally had to pour a coffee can full of gas in the nest. But not before we had a lot of fun with the airsoft gun. The one he had was like 6-700 fps IIRC and would kill the bumble bees dead.