In Yukon Territory, dispersal distances of juveniles were as follows: females, mean 120 m, median 61 m, n = 101; males, mean 515 m, median 241 m, n = 49 (Byrom and Krebs 1999).

Activity reduces lichen cover, whereas monocots and dicots increase (Mallory and Heffernan 1987). Predators include ermine, wolves, arctic fox, grizzly bear, and humans.