I have this bee house. It has a lot of these in it. It's the best pic I could get. When I get close, they come out and fly at me. Are they need? What kind?
Mine is mainly populated with native bees, I have not seen a wasps in it.
The larvae stay in it, I had a ton emerging this spring from the tubes.if they are bees, do they stay in the tube house in the winter?