American Herring Gull (smithsonianus)

(last update: October 30, 2015)

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

American Herring Gull (smithsonianus) sub-adult, June 06 2015, Manitowoc, IL. Picture: Amar Ayyash.

Probably 5CY bird: overall adult-like with single immature marked feathers (in tail and tertials) and dark pigmented iris. In flight probably showing black on primary coverts.