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, November 14 2004, Monterey Bay, California, USA. Picture: Jeff Poklen.

See this website by Jeff, showing West coast birds mostly.

This bird is most probably in adult plumage, as it lacks any immature markings in the greater primary coverts, tail, secondaries or tertials. Bold winter streaking and paler base of bill. Incomplete W-pattern on P5 and a tiny spot on P4.