Every spring, around mid April, we get a migration of ruby throated hummingbirds...the red throated males usually arrive first and stake out one of our many feeders... they are very territorial, and will fight off other males, only allowing their female harem to feed. Click the link for a video of the feeding...
the stout male
one of the slender females
females feeding...
the male on the other side "flashes" a warning with his tail feathers...
Hummers page 2