Black-headed Gull, Dunkirk, 9th July 2013 © Tony Martin
'I
saw a BHG approaching closely, and was fortunate to get it focused as it flew
past. As it did so, I thought I saw something white on its leg. I saw the bird
feeding two large chicks on July 9th. This ring was placed on a chick in
northern Poland (1151km E) in 2010.' TM
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