sheldrake and shelduck / ristisorsa (Tadorna tadorna)
occasional during migration [1]
Occurrence codes for all of Finland appear in square brackets; [6] to [1] means abundant to very rare breeder, [0] regular non-breeder (source: Tapio Solonen, Suomen linnusto, Helsinki: Lintutieto, 1985).
Special thanks to Erkki O. Mäkelä and Robert A. Thiel for help in compiling the list.