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Larus ridibundus Oulu . fi Naurulokki Chroicocephalus ridibundus Hupisaarilla Oulussa en Blackheaded Gull Chroicocephalus ridibundus at Hupisaaret Islands in Oulu own Estormiz cczero Uploaded with in Oulu Birds in Hupisaaret Islands Chroicocephalus ridibundus adult in summer plumage May in Finland Taken with Canon EOS D