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; some black on lower mandible and cutting edge. Pink base of bill.
Speckling: 75-99% (overall grey-brown iris).
Primaries blackish. No thayeri pattern on underside of P10. Large black mark on outer web of P5.
Longer bill suggests male?