I love to see stuff like that and know that my little corner of the earth is doing it's best to add to the creatures we have.
That's why it makes me so mad to know my neighbor is out shooting possums, raccoons, groundhogs, and chipmunks. He thinks he protecting his (and our) property. He said, "If I don't kill them, they'll dig under your storage building." And I said, "SO??" Then he said, "The floor will cave in." The dumb part was that the building he's talking about was built to house stored cars and doesn't have a floor. So the groundhog just digs down under the wall and in a little bit and he has a nice dry burrow. HE's not so dumb. But then the neighbor stuffed rocks and bricks in the burrow and got upset when it started digging under his garage/storage building.