This is another of my recycled materials birdhouses. I'm pretty fond of this one. It uses 1X lumber along with side cuts from some old logs.
There are some key ornaments, along with drawer hardware and a door stop that is doing duty as a perch. The side hole has screening in it to protect against anything getting in through the side, but it still offers some ventilation.
The roof is made from a piece of old tin roofing from a dismantled barn. I can't wait to get it up on a tree where I can watch for future tenants.