Ohio FFA Camp Muskingum promotes them. You can sit on the huge second story porch next to the lake with out bug spray. They don't let them nest over the sitting area. 


I accidentally let a pair nest in the shop last year. sure were less bugs. We got so used to each other, they would buzz by when I opened a door. I like having them and bats around the yards. 

They got too messy. So I will try to keep them out this year.