Chroicocephalus ridibundus - Black-headed Gull
This Black-headed Gull was ringed near Chertal, Belgium (50° 40' 0 N, 5° 40' 0 E) on January 30, 2010 as >2CY. It was seen in Oegstgeest on December 11 and 12, 2010 and again on November 11, 2012 and February 9, 2013. This individual had remarkably orange-colored legs.