Crows are presumed to be reasonably intelligent, but here's one that should probably be in the winter Olympics.
This video shows a crow in Russia sliding down a snowy roof while standing on a jar lid.
Once the bird makes it to the bottom, he grabs the lid in his beak, flies back to the top of the roof, and slides down again.
The clip has become quite popular on the internet, with more than two-million views in the last week.
A bird scientist at the University of Nebraska says he's not sure what to make of it scientifically, but he says it is a funny example of play-like behavior in crows.