Constructed of PVC pipe and attractively painted to resemble birch bark. Bluebirds prefer to nest in open areas such as grassy fields. Therefore boxes should be placed away from thickets, shrubbery, or forest edges where woodland cavity nesters such as titmice, chickadees and House Wrens might be attracted to the box. Wren nests are identified by the presence of small sticks nearly filling the box. Carolina Wrens are not a problem as they don t usually use boxes.
Height is more important for the nest box monitor than for the bluebird.
Mount the box on a pole so that the entrance hole is eye level. All boxes should be of the type that will open either from the front or the side, both for monitoring and maintenance purposes. If you are putting up more than one box, the rule of thumb is placement of about 100 yards or more apart. This will ensure enough territory for a bluebird pair to find food for their young . This will ensure that parasites are removed from the box in the case of future nestings.