Who Was That?

When I went out to check the track in yesterday’s post, I also saw interesting tracks in the snow beneath the suet feeder.  Can anyone help me identify these?  Sharkey?

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At this point, I picked up the camera, prepared myself and went back out to the scene.  I found some fresh tracks where the snow was not as deep.

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As you can see, they are paw prints — just at tiny bit wider than my thumb.  Looks too big for a mouse, and it looks like un-mouse-like pads on the paws.

Lunch call.  Gotta go.