We have had the feeder up about a week now. A few days ago I installed a branch for them to sit on-mainly so I could take pictures…It’s always been just one male and one female visiting the feeder. Well the other day another male showed up and they were fighting over the female. One male would sit on the branch and the other one would buzz him trying to make him move…I watched this back and forth for more than a couple of hours. It was like king of the hill, they traded places on that branch until one finally held his ground. The other one finally gave up and moved on.