Black Bear claws are adapted for them to easily climb trees, cubs right out of the den they are ready and capable. Unlike the long claws of the grizzly bears, the black bears have sharp, shorter and curved claws, perfect for climbing trees to get away from predators, a place to sleep, rest or to find food. Two black bears can get into a fight on a tree, the advantage would be for the bear below, the upper bear can't fight face to face and when bears do climb down, their bottom has to be facing the bottom. In the case of this picture, the cubs were sleeping on the tree while their mother was feeding below. She climbed up the tree and woke up her cubs, the sleepy heads one by one climbed down.