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) 3rd cycle / 3cy, November 09 2013, Clinton Co, IL, USA. Picture: Amar Ayyash.

Aged by grey P1-P2 and adult-like pattern on P4-P6, also mirror on P10. Last phase of complete moult, outer primary P10 maybe just still growing. Note much black on tail and centres of secondaries. Already deep pale tongue on P8.