Herbivorous, feeding on lichen, moss, grasses, bark, leaves and twigs.
Up to 12 years in the wild and 15 in captivity.
According to the region and the subspecies, the status varies from special concern, to threatened to endangered.
The woodland caribou forest-dwelling ecotype is vulnerable and the mountain ecotype is threatened
From 18 to 30 months old, mating takes place between late September and early November. A single fawn is born in June after an approximate 7 ½ month gestation period and is weaned after 4 months.
Grey wolf and grizzly bear. Fawns can be the prey of Canada Lynx, black bear, wolverine and golden eagle.