American Herring Gull (smithsonianus)(last update: October 30, 2015) |
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Slaty-backed Gull (schistisagus) adult, May 02 2010, Obakosaki, Japan. Picture: Shigenobu Aizawa.Please visit Aizawa's Blog for many more pictures! Alternate plumage, breeding conditions. Not always obvious which is the male in this species; almost equal in size. |