Thayer's Gull (thayeri)

(last update: January 22, 2013)

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

Thayer's Gull sub-adult, December 10 2013, Half Moon Bay, California. Picture: Alvaro Jaramillo.

In all respects very adult-like bird, but size of black spot on bill probably indicate younger adult (4th cycle?).