She does this by making a particular woofing vocalization. An agile climber, mother bear sometimes climbs the tree with her young as an awesome deterrent to an animal posing a threat. At times however, the mother bear absolutely must leave the cubs alone. When this happens she often chooses to hide them in a thicket where hopefully they will not be found by predators. In case of danger, the female bear us usually close enough to drive away intruders, however she is not always successful.
Many bear cubs die from natural occurrences every year.
In addition to protecting her young and feeding them, a mother bear, or sow as she is known, must also teach her offspring the ropes of survival. Her young cubs will learn the best food sources, how to deal with physical threats from boars, or male bears, and threats from other predators such as wolves, as well as where to make a den. Though the mother bear weans her cubs between July and September of their first year, her training to help them survive in the wild will take two or three years. If the mother bear becomes sick or injured during this training period leaving her cubs as orphans, the cubs will also die. Even older cubs are put at risk by their mothers death if they have not have learned enough information to keep them alive in the wild.