A friend of mine has been making birdhouses out of reclaimed lumber from foreclosed homes. I got interested in building my twist on birdhouses. I began to research all that involves a proper birdhouse. It occurred to me that the outhole kicker on most electromechanical machines might make a perfect hole for the birdhouse. My target bird is the House Wren. They are the most prevalent bird in North America. As it turned out, the outhole is a perfect diameter for these birds.