(Bluebird nest box used for example)

1. Entrance hole is 1 9/16” in diameter and 6-7” above floor.
2. Trim of 1/2” of corners of bottom panel for water drainage.
3. Two 1/2” holes should be drilled at the upper end of both sides for ventilation.
4. For easier construction, the roof should be put on last. First step is to glue and nail the side to the back; then front to side; then floor; hinged side is next before the roof. The roof and top of front could be beveled up to 13 degrees for a tighter fit.
5. Hinged side is shorter by 1/4” to allow side to swing.
6. A 1” predator guard should be placed over the entrance hole. A conical sheet metal protector guard can also be strapped around the nest pole or tree.
7. Wood glue, in conjunction with galvanized nails, should be used for construction
8. Wood should be 1/2” - 3/4” pine, redwood or fir. Plywood can be used, but is not preferred since it usually doesn’t last as long under adverse weather.

Note: This basic floor plan can be used for virtually all species of cavity nesting birds, although dimensions must be modified for the different bird species (see dimensions chart). You can create other styles of nest boxes, as long as you follow the general guidelines listed in this booklet.

If you wish to attract specific species of birds, be certain that the areas in which you install nest boxes have the habitat features that those birds prefer.

Nest boxes should be installed during late winter/early spring for usage during the following breeding season. However, winter resident birds will sometimes use nest boxes for roosting during the winter months, so installing nest boxes at any time is acceptable.

Not all nest boxes will be used by cavity nesting birds. Sometimes it takes a few breeding seasons before a pair actually takes up residence. If no birds use your nest box after a few years, try moving it to a new location.