August 12, 2012 There were at least 2, probably 3 or more, unusual hummers in the yard today. They had mostly yellow backs, no rufous, but otherwise resembled immature Rufous Hummingbirds better than any other US species. The yellow was not as bright as male Goldfinch, but distinctly yellow, with some darker spots that could have been green or black. At least some had white half-circle eye rings behind the eyes. The tails appeared to have white tips on the outer 2-3 feathers. Breasts and bellies dull white. They were feeding and perching mostly in a large pear tree, came near the hummingbird feeder but did not feed. They frequently scratched necks and other front areas vigorously, like a dog; I had no idea hummers had legs long enough for that. They tended to chase away the female and/or immature Ruby Throats in the area. They appeared slightly larger than the Rubys. The time was about 8:15 to 9:30 or later. Does anyone know of yellow-backed hummers? David Patterson Houston Lane Ooltewah, Chattanooga area, Hamilton County