Slaty-backed Gull L.schistisagus
13th January 2004 Choshi Chiba Japan
Same individual as above.
A very typical individual. The primaries are brownish, not real black.
Note the combination of pale head-breast and dark belly of the left bird. This pattern can be seen very often in this species.
A fresh individual. Almost juvenile plumage.
This tail-pattern that shows extensive white at the base is not typical, but is not difficult to be found in Japan.