Glen Walbek, Joey Kellner, others and I looked through the many gulls at Cherry Creek this AM. Most of them were loafing around two pools of open water on the east side and southeast corner. Almost all the gulls were "Ringers," with a few California and Herring Gulls. Glenn spotted a possible Bonaparte's Gull tucked almost invisibly among a dense flock of Ring-billed Gulls. Alas, no rare gulls could be found. We ran into Don Beltz. He reiterated the field marks I mentioned in my earlier post that favored Black-tailed Gull as the ID of the bird he saw yesterday about mid-day. Additionally he mentioned that the mantle color looked the same as on nearby Ring-billed Gulls, whereas BTGU should have a darker mantle. He also thought that the black tail band was more narrow than the broad band the field guides illustrate. When searching the gulls at Cherry Creek, consider second cycle Ring-billed Gulls, and if you see a Black-tailed Gull, please try to get a photo and post to Cobirds asap. Thanks, Joe Roller, Denver
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