Distribution of bank vole Myodes glareolus (gray) and red vole M. rutilus (striped area). Numbers in white circles on the enlarged map of Finland refer to the localizations of trapped populations: 1 - Tammela (SW), 2 - Virolahti (SE), 3 - Kannus (CW), 4 - Sotkamo (CE), 5 - Kolari (NW) and 6 - Savukoski (NE). Species distributions after: Amori et al. 2009 and Linzey et al. 2009.