American Herring Gull (smithsonianus)

(last update: October 30, 2015)

Coordinators:
Amar Ayyash (US)
Bruce Mactavish (Canada)
Dave Brown (Canada)
Mars Muusse (Netherlands)

American Herring Gull (smithsonianus) adult, October 28 2007, Monterey Bay, California, USA. Picture: Jeff Poklen.

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

West coast bird in active moult: P10 old, active moult in rectrices. Lacking obvious immature markings, but little black in the greater primary coverts. Bold winter streaking. Complete W-pattern on P5 and black on P4. Note very short P10-tongue, on far wing from below.