Gull Research Organisation

Thayer's Gull (thayeri)

(last update: January 22, 2013)

Coordinators:
Amar Ayyash (USA)
Mars Muusse (Netherlands)

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 adult, February 10 2012, Fort Baker, Golden Gate National Recreation Area, Marin County, CA. Picture: Bob Gunderson.

Visit: Bob's Flickr photostream.

Broken subterminal band on outer web of P10, medial band on P9 broken on inner web (classic thayeri pattern) and complete black on outer web, no black spot on outer web of P5.