The Eastern Bluebird lives throughout the East. The Western and Mountain Bluebirds live throughout most of the West. The box should have drainage holes in the bottom and ventilation holes at the top of the sides. The diameter of the floor should be about 4 by 4 inches for Eastern Bluebirds and 5 by 5 inches for Mountain and Western Bluebirds. Place the box in open, mowed habitat at least 100 feet from brushy wooded areas.
Good areas are large lawns, open fields, farmland, pastureland, and parks.
Mount the nest box about 4 to 5 feet high on a metal pole, facing any direction. Put boxes up by early March, before nesting starts. Check your box at least once a week during spring and early summer. Opening the box will not hurt the birds. Bluebirds make neat nests of fine grasses or pine needles and have 4 to 6 blue, rarely white, eggs.