A popular pastime is to install and maintain bluebird trails, lines of a number of bluebird houses spaced specific distances apart and much is written on the hobby.

 

Mount bluebird houses 3′ to 6′ high in partial sun and shade on posts in woodland clearings, grove and shelter belt edges bordering fields, among scattered trees, or pasture fence lines.

See each bird species page for areas where their ranges overlap. This birdhouse might attract either bird in that overlap-area. For eastern bluebirds mount this house 3′ to 6′ high in woodland clearings, tree grove edges bordering fields, among scattered trees, or pasture fence lines.

Bluebirders often place tree swallow birdhouses within groups of bluebird houses because they protect their territory from sparrows, grackles and other intruders, yet are good neighbors to bluebirds.

1 1/2″ entrance holes are recommended for tree swallows. Yet a pair of tree swallows were observed nesting in this swinging birdhouse with a 1 3/8″ entrance hole. So it is included here as well as the side mounted house. You could adapt this birdhouse with a 1 1/2″ entrance hole. It can also be installed in a fixed position on walls, posts and trees.

You could also adapt this birdhouse with a 1 1/2″ entrance hole for swallows. The volume and 1 3/8″ side entrance hole in this nest box normally accommodates Chickadees, Nuthatches, Titmice, Wrens and Downy Woodpeckers.