Common Black-headed Gull (Larus ridibndus)

Note; pure snow white underparts of body, head and major parts of wing; note orange-flesh bill with dark tip, dark eye and spot behind ear and eye; note the dark outer tip of flight feathers which, progressively, towards the outer primaries get more and more dark, however and in strong contrast, the outer most being white. October plumage. Copyright © Louis A. Hansen

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