Below is a summary of the most popular designs. For ease of monitoring, a modified design with a side or sometimes front opening is now recommended. The easiest way to make this box is from detailed plans. Plans for the Peterson Box are available at the NABS website . 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.