We used to have a number of bird feeders. We used reference books to identify the birds that visited and kept a list. On a number of occasions we set up the tripod and camera near a feeder and used a remote cable to capture close-up photos of beautiful birds. It's been a number of years since we have done any of that. One year, as the bears became more numerous, they discovered and destroyed all of our feeders.
The only feeder we have been able to maintain is one for the hummingbirds. If I am sitting on the deck I usually hear them and then look up to see them hovering over the feeder. They are beautiful birds and fun to watch swooping from a nearby tree to the feeder and back. It's very peaceful to watch them in action.
But the other day, two hummingbirds were trying to feed at the same time and for some reason they would not tolerate the other one's presence. They were aggressively dive bombing each other and you could hear their flapping, vibrating wings clashing. So much energy was expended in fighting off the other one, you'd think they could just each take one side of the feeder and both eat. There was plenty of food for the both of them. This clashing and fighting went on for about ten minutes before I decided to take a photo. It's a bit blurry but perhaps you can see both birds trying to get a bit to eat before being chased off by the other.
Does anyone know why hummingbirds might act this way?