Thayer's Gull (thayeri)
(last update: January 22, 2013)
Thayer's Gull 3rd cycle (4CY), 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).
Still looking immature, but note typical pattern on 3rd gen secondaries: grey centres with white tips).