Why do bears hibernate?

Answer 1

Most species of bears (but not pandas) will hibernate during the winter because their food supply decreases during that time. If they were active in colder weather, they would need even more food.

In the United States, Black Bears hibernate in the northern states during the winter but do not hibernate in Florida where a greater food supply exists during the winter. Bears hibernate because there is not enough food to sustain them during the winter season.
Because there was never enough food for them to survive so they evolved to conserve energy through the winter to survive
Bears hibernate in the winter (and sometimes late fall and early spring as well if it is cold enough), so that they can conserve energy while food is scarce. Bears are large creatures and it takes a lot of energy to hunt. By hibernating, bears use little energy while sleeping so that when spring comes they can feed on an abundance of prey and vegetation.

Bears hibernate to stay warm in the winter, and because there might not be enough food in it's natural habitat.

I hope this answers your question.
Bears hibernate because their food sources are not available. When they hibernate they use a lot less energy than they would if they wandered around looking for food.

Answer 2

Most species of bears (but not pandas) will hibernate during the winter because their food supply decreases during that time. If they were active in colder weather, they would need even more food.

In the United States, Black Bears hibernate in the northern states during the winter but do not hibernate in Florida where a greater food supply exists during the winter. Bears hibernate because there is not enough food to sustain them during the winter season.
Because there was never enough food for them to survive so they evolved to conserve energy through the winter to survive
Bears hibernate in the winter (and sometimes late fall and early spring as well if it is cold enough), so that they can conserve energy while food is scarce. Bears are large creatures and it takes a lot of energy to hunt. By hibernating, bears use little energy while sleeping so that when spring comes they can feed on an abundance of prey and vegetation.

Bears hibernate to stay warm in the winter, and because there might not be enough food in it's natural habitat.

I hope this answers your question.
Bears hibernate because their food sources are not available. When they hibernate they use a lot less energy than they would if they wandered around looking for food.

Answer 3

Actually, bears do not truly hibernate. During periods of cold weather when food is scarce, they go into a state of torpor. This is more like a sleep or period of inactivity. It is not a true hibernation, however. In torpor the bear can wake up suddenly if touched or awakened by a noise. In hibernation they could not.