A few years ago, my husband built a birdhouse as a crafts project, never intending for it to be used. He installed it on the fence next to our back gate, which we use to access a driveway via our back door. The birdhouse is about 5 feet off the ground, and every time the gate is closed, the fence vibrates. Still, last year a couple of hardy Bewick’s wrens decided to build a nest in there and raise a family–and we began to use our front door a lot more often.