The wolverine has a circumpolar distribution (click to view PDF) that corresponds with the boreal zone of the northern hemisphere, occurring throughout arctic and subarctic regions and boreal forests of Eurasia and western North America (Kvam et al. 1988 from Pasitschniak-Arts and Larivière 1995). It is generally found south to 37 degrees north in North America and 50 degrees north in Eurasia (Pasitschniak-Arts and Larivière 1995, Copeland and Whitman 2003). The wolverine’s worldwide presence (fundamental niche) is congruent with the distribution of persistent spring snow cover and may reflect adaptations toward elevated thermal avoidance (Copeland et al. 2007)