Is that the bear's shadow or the tree's? Who's going to get close enough to check?
February 2nd in Serbia is known as Sretenje, and one of the traditions of Sretenje is that a bear will rise from its winter hibernation. Seeing its shadow allegedly frightens the bear into scurrying back into hibernation mode for another 40 days, meaning winter will be longer.
In Romania, this bear-watching tradition is called Stretenie, or Ziua Ursului (Day of the Bear), and it’s also on February 2nd. Hungary also keeps an eye out for shadows around bears on February 2nd.