Herbivorous, feeding on leaves, twigs and herbaceous plants.
In nature, up to 15 years. Around 20 years in captivity.
Cows reach maturity at 2 years of age while the bull must wait 3 years to breed. Breeding takes place between August and October. In late May, early June, following a gestation period of 8 ½ months, the female gives birth to one fawn that is weaned after 4 months.
Grey wolf, grizzly bear, cougar. The young are also prey to the black bear.