Thayer's Gulls  Larus thayers
February 28th 2012 Choshi Chiba Japan



4th winter


The dark marking reaches outer web of P5.



Outer greater primary coverts have some brownish pigmentation.


Presumed the same individual in 2009.



A pale-eyed adult.




The dark marking reachs P5, both outer and inner web.




3rd winter.