The wasps here must be too snooty to make their nests (cocoons? ) in trees. I keep finding their mud cocoons on our porches. About a month ago, I destroyed one on the back porch and they made a new one within two days. I found a new dirt cocoon today as I was cleaning off the side porch. It was on a chair so I just left it out in the rain then broke it up later. I really hope they find another location. . . away from the house.