Starting last week, I could hear something scratching as I sat in my bedroom reading. I called Cara in to check my sanity. It wasn't Fifi - sometimes she scratches a bare 2x4 in the room. It went away when I banged on the wall so I forgot about it.
But this morning it started again, louder, and longer.
I opened up one section of the wall



I walked outside to see if I could find a hole somewhere, and from the ground there was nothing. Then I figured something might be chewing it's way in through an eave that I can't see without a ladder. So I stuck a camera on a broomstick:

and found this hole:
(the video is washed out, it's hard to understand what is going on, but at about :10 into it I center on a hole chewed into a small section of roof.)
The hole is on this low, small piece of roof under the eave:
