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), 2CY, July 02 2013, Sandy point - Plum Island, MA. Picture: Suzanne Sullivan.

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Complete moult: P5 fully grown, P8-P10 still old juvenile. Moult in coverts almost finished with last gap in central GC still visible, and exposing the old juvenile secondaries underneath. Upper row of LC still juvenile. Upper TT replaced. Active moult in tail.