These have grown from a few annoying insects to a large swarm across about 40 feet. The back wall of my house. There are many thousands of them now over the last two weeks. They don’t seem to bite (much). I don’t see any bodies or wings on the ground or on the plants. They seem to calm down after dusk and into the early morning. From around 10 am til dusk seems to be when they are the most active. I hope these pictures help.