Unusual Sight

It was a day of the millennium year, everything was as usual. The caretakers went to the cage of Mäuschen to check if she needed more food. The caretakers had no idea what were they going to witness. While standing in front the bear’s place, for some unknown reason one of the caretakers looked upon a tree. The man could not turn his head down for a while. What had he seen over the tree? Find that out on the next slide.