Over the past week every night there is a large swarm of bee like little bugs that have taken up residence in one of my Fairy Dusters. The fly around and clump on some of the branches. They are really not doing anything except freaking the wife out thinking they will attack her. Yeah she watches too many horror movies. The plant has no aphids or other bugs that would attract a predator species. During the day they are off doing other things, then at dusk they start to swarm on the same two branches of the Fairy Duster. They lump up and kind of wiggle around a bit, but that is it. They have black abdominal with horizontal white stripes. One minute I would say that their wings were fly like, but then they shift and they look like bee wings. There are two straight antennae coming off the head and I have not been able to get a good look at their faces. But I am betting they have very large eyes for their size) like a fly. These guys are pretty docile. I walked right up and put my hand within a couple inches and they paid no attention to me. Any ideas. I'm in Tucson if that helps.
I googled that name and sure enough there they were! Cool beans! Now I know something about my garden squatters. Apparently they are stingless and very important pollinators (like all bees). They can stay as long as they want.