Re:black-headed gull

To: "Mark Clayton" <>, "'Tobias Hayashi'" <>, <>
Subject: Re:black-headed gull
From: "Shaun Bagley" <>
Date: Tue, 17 Oct 2006 22:51:21 +1000
While I think that there is a very good chance that the second bird is a Herring (or Vega) gull, the light in this photo makes me wonder if this is not a Slaty-backed Gull which is more abundant in winter in coastal Japan. Then again, if the primaries truly are paler (and not a light trick) then there's an outside chance it's a Glaucous-winged Gull where the primaries are truly grey rather than black as in the two prior species. The Glaucous-winged is a northern Japan visitor during winter so not outside possibility that would be around Tokyo. All have similar streaking and spots on bill so would take someone who is very familiar with all 3 to distinguish in my opinion.
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