This is why you don't escape from a bear by climbing a tree

In Alberta, Canada, a bear was observed climbing this electric power transmission tower in order to gain access to the ravens' nest near the top.

"Over the next few minutes we watched him very skillfully climb the tower while the ravens were diving at him pecking at him, squawking, trying to do everything they could to discourage him, and he just climbed right to the top."

After raiding the nest, the bear was able to negotiate the tower framework to descend safely.

Via Nothing to do with Arbroath, where there are additional photos and a brief video.    

Image cropped for size from the original and lightened for clarity.