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Are you saying it figured out there was less friction with snow in matter of few seconds? All the while it's mind was occupied by something it had in its claws? It could be a genius crow(there has to be variation in intelligence amongst crows too), we will never know. I thought it got irritated with that thin edge quite quickly(being not able to stand comfortably) and hence flew away to look for a thicker one.

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No, I think it's unlikely that the person filming caught the crow the first time it began to sled, and what we see in the video is a crow enjoying playing with physics the same way that we do. By "the first time" I meant "the first time the crow slid on something it was standing on, regardless of when that was", although I wasn't very clear about it.

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