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Chroicocephalus ridibundus Terschelling the Netherlands. en Chroicocephalus ridibundus blackheaded gull on the beach Terschelling the Netherlands nl Chroicocephalus ridibundus kokmeeuw op het strand Terschelling Nederland own Bj schoenmakers cczero Uploaded with Chroicocephalus ridibundus adult in summer plumage Birds of the