These bruisers are camped on my front lawn. I specifically left them alone all summer to see what they would do. I can't find this particular species in the Guide, most yellowjackets and ground hornets having black faces and no stripes on the top of the thorax. They are not particularly aggressive as I can get within 4 feet without any commotion on their part at all. They are apparently a very busy lot with much comings and goings.