Photograph of Standard Mount Nest Box
This is a standard mount nest box. It is 22” deep, 22” high in the back, 20” high in the front, and 34” wide. The box uses T-111 cedar siding for the outside. T-111 siding is lightweight, easy to get, and very durable. The long arm provides a perch for the falcons.
It is important to have about 4" to 6” of pea gravel for nesting substrate. Too little gravel could cause egg punctures. Too much gravel will interfere with drainage, causing the box to rot quickly.
Drill 15 to 20 small evenly-spaced holes in the bottom for drainage.
See this url for more information: www.raptorresource.org/pdf/standard_mount_doc.pdf