2cy Baltic Gull L f fuscus
1-3: © Hannu Koskinen, 14-07-2007. Tara dump, SW Finland.
CK64 would probably go unnoticed as a 2cy fuscus in W Europe. Moult- and plumage-wise (rather boldly marked feathers patterns, streaked head and blotched underparts), it is similar to many intermedius or even graellsii.