Chroicocephalus ridibundus - Black-headed Gull

This Black-headed Gull was marked at the Przykona Reservoir, Radyczyny, Turek, Poland (52.00 N 18.39 E) on the 4th of June, 2009 as adult male. It was seen between December 16, 2009 and March 13, 2010 in Leiderdorp. It returned again to Leiderdorp on November 28, 2010 and stayed at least to January 30, 2011. It returned for the 3rd consecutive winter on November 9, 2011, and was also present November 13, 2011. So it spends its winters approx. 950 km east of its ringing place.