This guy was adorable (about a foot long, super thin, and amazingly fast). He lived in a crack in a large boulder, and was very curious about my presence on his tundra home. He would dart around me on one side and pop up from behind a stunted willow, only to once again dart all the way around to the other side of me and pop up from behind a rock. I have to say he was the fastest small creature I've ever seen. I'm talking amazing, blink of the eye fast. He will soon change his fur to a beautiful snow white to better blend in during the winter months.