Thayer's Gull (thayeri)

(last update: January 22, 2013)

Amar Ayyash (USA)
Mars Muusse (Netherlands)

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; much black on both mandibles and cutting edge. Greenish yellow base of bill.

Speckling: 25-50%.

Primaries blackish. Obvious black markings on P5.

Probably younger adult (4th/5th cycle?).