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 and some black on lower mandible. Pinkish base of bill on lower mandible.

Speckling: 10-25%.

Primaries greyish-black. No sub-terminal pattern on P10. Diffuse pattern on P5.