Bluebird Houses are usually mounted in pairs. We carry special mounting poles and hardware used for these houses. The Bird House carries several different designs to accommodate bluebirds. One of the most popular styles is the Sparrow-Resistant House. Its special design is made to appeal to bluebirds and dissuade sparrows. We carry the Peterson bluebird house, with a slanted design to deter predators. Others come with viewing windows, nest lifts, or even a video camera inside!