Great Black-backed Gull (Larus marinus) NOS 367981 16CY, October 22 2017, Scheveningen, the Netherlands.
Ringed as pullus on June 22 2003, at Lyngholmen, Lyngdal, Vest-Agder, Norway (58°00'37"N 007°00'49"E).
Used to be wearing a coloured ring: pale blue JZ1G.