Many bears live where the winter is very cold. In these places, bears will find or make a den. They will enter the den when it gets too cold and stay there until spring. Bears will not eat or drink during this time. Cubs are born while the mother bear is hibernating.
Bears have a few enemies.
In North America, bears are sometimes killed by packs of wolves. In Asia, large tigers kill and eat brown bears and Asiatic black bears. Also, male bears will sometimes kill cubs and female bears. People are a bear's biggest enemy. People kill bears for sport.