American Herring Gull (smithsonianus)

(last update: October 30, 2015)
Coordinators:
Amar Ayyash (US)
Bruce Mactavish (Canada)
Dave Brown (Canada)
Mars Muusse (Netherlands)

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American Herring Gull (smithsonianus) adult, February 10 2008, Dryden, NY, USA. Picture: Mike.

See Mike's Picasa website for many more taxa and images of American Herring Gull.

Showing classic smithsonianus upperwing, never present in European birds: Long grey tongue on P10 ends curved, very steeply leaving a narrow medial band (almost thayeri pattern). Mirror on P10 and full sub-terminal band. No mirror on P9, 'bajonets' on P6-P8, white moons on P7-P8, W-shape on P5.