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) 4CY, August 13 2013, Stratford, CT, USA. Picture: Donna Rae Henault Caporaso.

Bird in active moult, with new adult -like inner primaries. Moult stage P4/P7, with P5 just a fraction shorter than P4. Old secondaries and rectrices have extensive black at the centres.