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, February 20 2013, Stratford, CT, USA. Picture: Donna Rae Henault Caporaso.

Obviously much black on bill, which may indicate younger adult. Unfortunately, pictures do not show the greater primary coverts, which are often patterned in sub-adult birds.