Cubs are born. Mother licks them clean, keeps them warm and moves into positions for easy nursing. Hibernation and care of cubs continues. Testosterone levels of adult males begins to rise. Food very scarce.
Adult males begin to roam.
Most others remain lethargic, eating mainly aspen catkins and willow catkins. All bear losing weight. Bears eating sprouting grass, emerging herbs and expanding aspen leaves. Cubs tasting what mother eats, but ingesting little except milk. Lactating mothers losing weight, others gaining weight slowly.