1st winter
Slaty-backed Gulls  Larus schistisagus
January 17th 2012 Choshi Chiba Japan 
 


Note the very typical overall structure and coloration. This type of birds are usually quite easy to distinguish from Vega Gulls.


 

A faded, but still relatively fresh individual.


 

This looks very like the above one, but has more worn scapulars and coverts.


 

A fresh and dark individual recalling American Herring Gull. But note the short-winged, stubby overall structure and pale fringes to the primary tips.