Just had this same conversation with my neighbor this morning. She hung up a second feeder near her first last summer and it got no traffic. She asked if hummers are territorial. I know they are, but I've seen these videos too. The only time I see two together in my garden is when they are doing a wild, swooping aerial dance — I never know if that's a mating ritual or territorial fight — but never sipping nectar near each other. I don't have feeders.
