American Herring Gull (smithsonianus)

(last update: October 30, 2015)

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

Slaty-backed Gull (schistisagus) adult, September 15 2009, Nemuro, Hokkaido, Japan. Picture: Hannu Huhtinen.

Active complete moult, P1-P6 new, P8-P10 old. No mirror on P9.