Thayer's Gull (thayeri)

(last update: January 22, 2013)

Coordinators:
Amar Ayyash (USA)
Mars Muusse (Netherlands)

Thayer's Gull 1st cycle (1CY), November 05 2010, Fernhill, OR. Picture: Birdmeister.

Visit: Birdmeiuster's weblog.

Bird in juvenile plumage. Black bill. Note extensive dark tertial centres and pale crescents on primary tips.