I photographed this tree about 12 days ago. The characteristic teeth marks left on the wood indicated that the perpetrator was a beaver (Castor canadensis). But for whatever reason, the beaver had left its job unfinished.
Imagine my surprise yesterday, when I passed by the same spot and noticed that the beaver had returned and finished chopping the tree. When I saw where the tree had fallen, though, I couldn't help but laugh. After all that trouble, the beaver still couldn't get its tree.