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) 1st cycle (1CY), October 07 2016, Michigan City, IN. Picture: Amar Ayyash.

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1st cycle with ~100% of scapulars replaced. Somewhat unusual is a few wing coverts (median and greater) have been renewed. This usually doesn't take place with the majority of hatch year herrings that Amar encounters. A better angle of this in the photo below.