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) 5cy, February 24 2008, St. John's, Newfoundland, Canada. Picture: Bruce Mactavish.

Obviously immature. Full sub-terminal black band on P10. Mirror on P9 confined to inner-web. P5 band with characteristic black W-pattern. Rectrices already completely white. Note vestiges of black on centre of primary coverts, an indication of younger adult (5cy / 6cy).