Thayer's Gull (thayeri)

(last update: January 22, 2013)

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

Thayer's Gull 5CY, February 15 2014, North Point Marina, Winthrop Harbor, IL. Picture: Maarten van Kleinwee.

Visit: Maarten's blog for many more images!

Individual with black markings in the outer tail feathers.