They have a large vegetarian diet. Bears drink lots of water and in hot weather they wallow in streams. In autumn, bears have to eat heavily to fatten themselves up. Their winter den may be in a hollow tree or log. Females often select more sheltered sites than males.
Males hibernate alone while females give birth while hibernating in their dens.
Bears find their mate from early June to around mid-July. It is accepted that they have many mates. A female raises one litter every two years. At around five weeks, cubs open their eyes. At around two months, they start to walk.