Gull Research Organisation

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) 2nd cycle (3CY), February 21 2015, Brownsville landfill, TX. Picture: Martin Reid.

Immature bird with pattern of 2nd generation secondaries just visible beneath the tips of the greater coverts: extensive brown centre leaving only thin white fringe. 2nd gen primaries with small tips worn away and no mirror on P10. 1st cycle bird in background. Note the clearly darker rear scapular feather.