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 07 2016, Michigan City, IN. Picture: Amar Ayyash.

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Adult type with a large P10 mirror showing several white "spots" on the underside of the primary. P9 with a weak thayeri pattern.