Common/Mew/Kamchatka Gull Larus canus
Most 'Common Gulls' wintering in Japan are supposed to be kamtschatschensis. So most individuals in this website are provisionally labeled Kamchatka Gull L. c. kamtschatschensis. But, some unidentifiable heinei may possibly be present among them. The North American form Mew Gull L. (c.) brachyrhynchus is scarce visitor in Japan. Identifications are easier than in heinei, though some problematic individuals are also found.
-and some heinei?