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) sub-adult, January 23 2011, Monterey Bay, California, USA. Picture: Jeff Poklen.

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

This West coast bird is probably in 4th cycle (5cy January, 4th winter), showing mostly grey upperparts and adult-like primary pattern. However, there are obvious dark markings in tail and primary coverts.