Thayer's Gull (thayeri)

(last update: January 22, 2013)

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

Thayer's Gull 1st cycle (2CY), January 27 2011, Point Reyes, CA. Picture: Peter Adriaens.

Bill base turning paler. Upper tertials not with completely solid dark centres.