Thayer's Gull (thayeri)

(last update: January 22, 2013)

Thayer's Gull 1st cycle (1CY), December 14 2008, Half Moon Bay, California, US. Picture: Chris Gibbins.

Visit: Chris's weblog.

Note extensive dark tertial centres and pale crescents on primary tips. Almost completely uniform dark texture on underparts and in the neck. Slightly odd scapular patternes, suggesting 2nd generation feathers in lowest row of lower scapulars, which would be an odd place to moult, especiallya s all upper scapulars are still juvenile. Probably "just 1st gen feathers with 2nd gen-like pattern".