Black-headed Gull/Kokmeeuw
© Ruud Altenburg, 29-02-04. Erasmusgracht, Amsterdam. Adult Black-headed Gull (Chroicocephalus ridibundus) Gdansk FN 25.874. Ringed on 27-05-00 as pullus at Januszkowice, Krapkowice, Poland. Adult Kokmeeuw (Chroicocephalus ridibundus) Gdansk FN 25.874. Geringd op 27-05-00 als pullus in Januszkowice, Krapkowice, Polen.