[texbirds] Re: Black backed Gull on Texas City dike - ID help please
- From: Tony Leukering <greatgrayowl@xxxxxxx>
- To: texbirds@xxxxxxxxxxxxx
- Date: Thu, 30 Jan 2014 10:54:22 -0500 (EST)
David et al.:
The problem with bird ID by consensus is that not all voters have similar
knowledge.
Great Black-backed Gull in its first year of life typically sports an all-black
bill, or nearly so, with even many second-cycle birds having the bill nearly
all black (see pictures 29.6 through 29.13 in the Howell and Dunn 'Gulls'
book). Additionally, the Texas City dike bird has replaced all of its juvenal
scapulars and wing coverts, something that a first-cycle bird does not
accomplish. It has replaced all of its juvenal barred back feathers with
adult-patterned -- if not adult-colored -- feathers that lack barring and there
are a few scattered dark unpatterned scapulars that are second-cycle feathers.
Sincerely,
Tony
Tony Leukering
Largo, FL
http://www.flickr.com/photos/tony_leukering/
http://aba.org/photoquiz/
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