Chroicocephalus ridibundus - Black-headed Gull
This bird was ringed as pullus on June 7, 2006 in Jez.Trezebielskie, Lipnica, Pormorskie, Poland, (5359.00 N, 1722.00 E) with a metal ring Gdansk FN.66228. On Dec 1, 2006 it received the white ring in Amsterdam, and the Gdansk ring was replaced by an Arnhem ring. I observed this bird between 13 February, 13 March 2010, and then again on 31 Oktober 2010 and January 30, 2011, and December 2012.