1st winter
Slaty-backed Gulls Larus schistisagus
February
16th 2007 Choshi Chiba Japan









An individual showing narrower tail band. The wing coverts also show well-notched pattern.


Note that the dark parts of the wings and the tail are brownish, not blackish. And the short-winged overall structure is typical.





A dark-winged bird.



A pale-winged bird


.
A bleached bird.



A Vega Gull for comparison.

Note that the dark parts are strongly blackish in comparison with Slaty-backed Gulls.