Pteromys volans orii

When I walked in the woods with snowshoe, and took a rest under the white birch tree, many Japanese tit “Parus minor minor ”.came flying.
I heard something knocking tree, so I looked up and found “Pteromys volans orii 〈Kuroda, 1921〉” in the hole of tree.

Many Japanese tit knocked the tree, the vibration made “Pteromys volans orii 〈Kuroda, 1921〉” wake up.
That’s a great gift.
I found their dropping around there.
There was nothing,
So I wander that he took a rest.