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[Gulls] Slaty-backed Gull?

wkcheng

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1# A A A Post at 30/03/2014 12:19  Show author

Slaty-backed Gull?

Please help to see if it is a Slaty-backed Gull.
Thank you!
2014.03.25
Mai Po


Flickr 上的 DSC_4905a

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cgeoff

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2# A A A Post at 30/03/2014 12:40  Show author
Nice photo of a mongolicus. The very pale, whitish coverts, which are also really worn, are a good clue; also the very pale grey tone to the mantle and the pale underparts.

GeoffC

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wkcheng

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3# A A A Post at 1/04/2014 23:01  Show author
Thank you very much for your help in ID.

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