We have lots of them around the last 2 years here. I think they come back to the same place year after year also. DW is ready in early spring with the feeders cleaned and ready to go. We think that you have to have the stuff out when they first show up in spring or they will move on. Right now the small babies are out buzzing all around and chasing each other. They have no fear of people they will hover about 6” from your face to check you out. I also think that those babies will come back year after year also, so you need to keep increasing your feeder supply. Happy to hear you are starting your own colony.