We’ve had screech owls living in one of our oak trees as long as we’ve lived here. They usually nest in this hole.
A few years ago we built and posted a kestrel box and an owl box. The owl box is just below this hole, but they’ve never shown any inclination to move in.
The other day while I was doing dishes, I looked out the window and saw this:
Hopefully, he’s moving in to stay!