I have about six hummingbirds visiting my yard this summer. They are so funny to watch. I have planted lots of balsam which they evidently like and now that summer is waning I have the nectar out. There is one alpha hummer who stands guard. over one feeder. He sits on the tomato cage and keeps all the other birds away from the nectar except for one. I gather it is his mate. The other feeder is in the back of the yard and there is one hummer who I see using it while the others fuss at each other over the one closest to the house.