Thayer's Gull (thayeri)
(last update: January 22, 2013)
Thayer's Gull adult, mid-January 2014, central California, US. Picture: Amar Ayyash.
Visit: Amar's blog for many more images!
Present flock of about >600 birds (170 1st cycles, 100 2nd cycles, 40 3rd cycles, 350 adults).
Purple orbital ring. Small red gonys spot on lower mandible. Pale yellow base of bill on lower mandible.
Primaries greyish-black. No sub-terminal pattern on P10. Diffuse pattern on P5.