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) 4cy (3rd cycle), February 09 2008, Dryden, NY, USA. Picture: Mike.

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

2nd cycle and 3rd cycle birds best aged on inner primaries pattern. However, an easy bird to age, with very immature upperparts, combined with typical 3rd gen P10 (with obvious mirror).