Thayer's Gull (thayeri)
(last update: January 22, 2013)
Thayer's Gull sub-adult, mid-January 2014, central California, US. Picture: Amar Ayyash.
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Present flock of about >600 birds (170 1st cycles, 100 2nd cycles, 40 3rd cycles, 350 adults).
Probably 3rd cycle, but may also be very advanced 2nd cycle (best to see inner primaries).
In 3rd cycle: