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) 1cy, October 08 2006, St. John's, Newfoundland, Canada. Picture: Bruce Mactavish.

Bird in juvenile plumage, with some replaced scapulars by early-Ocober: upper scapulars = 1-25%, lower scapulars = 0%, total scapulars = 1-25%. Some white notching running along the edge of R6.