Gull Research Organisation

(last update: October 30, 2015)

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

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See Mike's Picasa website for many more taxa and images of American Herring Gull.

Overall adult-like plumage, but note dark cetres on greater primary coverts.