Tracks in the snow this morning

The picture doesn't really do justice to how small these things are. They are about as long as an aglet and almost as thin. I should have put something in for scale. It doesn't seem to hop like a squirrel, and they seem smaller than squirrel tracks anyway. They came from the farmers porch in the front of the house and ended at a hole next to the birch tree that we had to cut down two years ago. I didn't see where they went after that, so the hole may have something in it.