I have fed them for the last 10 years. I have 4 that have returned for the last 2 years. They are territorial so there is always this air battle going on. They seem to stake a claim to certain feeders and the alpha bird tries to stop the others from feeding. I had to separate my feeders a bit so that all have a chance to feed. They also feed off the nectar from my hibiscus, firecracker bushes, butterfly bushes, butterfly weed, cannas, fuschia, milkweed, and daylilies. They also feed on small insects so in addition to being fun to watch they are also a good insect vaccuum.
Tim