Thayer's Gull (thayeri)

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

thayers rings
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Western Gull occidentalis 1st cycle (1CY), August 2012, West Cliff Drive Santa Cruz, CA. Picture: Jeff Cooper.

Visit: Jeff's Blog.

Bulbuous bill. Juvenile plumage. Some similarity to Thayer's Gull, but WESTERN GULL (w. N. America) larger and bulkier with broad wings and stout, bulbous-tipped bill. Plumage generally darker and browner with black wingtips; upperwing lacks contrasting pale panel on inner primaries, and outer primaries solidly dark; tail solidly blackish.