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Gull ID from SE Michigan, USA (1 Viewer)

zerb21

Bruce Moorman
I saw this gull at North Bay Park in Ypsilanti, Michigan, USA on November 26, 2014. Thank you in advance for helping identify it.
 

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looks like a vagrant slaty-backed gull. an open wing view (with the "string of pearls" visible) should reinforce this ID. as far as i know slaty-backed is a regular but of course rare guest (from NE asia) on lake michigan.
 
Thanks for the help identifying this bird. Here are some more photos of it.
 

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The spread wing photos posted should cinch this as a Slaty-backed Gull. This is a real good bird on the Great Lakes (and anywhere outside western Alaska in North America). You should report this to local list-serves/RBAs, as there are plenty of birders who would like to see it.

Andy
 
No gull expert here by any means ... curious how the wing cinches it as a Slaty-backed? My first thought was Lesser Black-backed gull.
 
steve, it's the mentioned "string of pearls" typical for SBG, which this gull definitely is. congrats to the rare find.
look at the pale 'moons' on primaries 5-8 forming a row basal to the black subterminal marks.
 

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No gull expert here by any means ... curious how the wing cinches it as a Slaty-backed? My first thought was Lesser Black-backed gull.

Lesser Black-backed Gull has extensive black wingtips with limited white spotting. Slaty-backed Gull has limited black on the wingtips with a row of sub-terminal white spots. This is quite evident on the middle picture of the second group.

Mike
 
Away on business for a bit and just back .. glad I refound this thread. Thanks for the explanation guys comparing this bird, to LBB gull! Very good info to know.
 
steve, it's the mentioned "string of pearls" typical for SBG, which this gull definitely is. congrats to the rare find.
look at the pale 'moons' on primaries 5-8 forming a row basal to the black subterminal marks.

Unless of course it had turned up in Britain where you would probably need DNA from its parents to get it accepted as a Slaty-backed Gullo:D

Cheers

Roy
 
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