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Black-Headed Gull

A non-breeding black-headed gull (Chroicocephalus ridibundus = Larus ridibundus).  Only breeding adults have the 'black' head, and even then it is really only dark brown.  The genus Chroicocephalus was recently split off from the genus Larus.

Photo taken in Whiteknights Park, Reading University grounds, Reading, UK, on 2009-01-18.

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