Thayer's Gull (thayeri)

(last update: January 22, 2013)
Coordinators:
Amar Ayyash (USA)
Mars Muusse (Netherlands)

thayers rings
thayers PDF's

thayers 1cy August
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thayers sub-ad January
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thayers ad January
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Thayer's Gull 1st cycle (2CY), February 05 2011, Westmoreland Park, OR. Picture: John Rakestraw.

Bird in juvenile plumage by February. Black bill with paler base. Note extensive dark tertial centres and pale crescents on primary tips.