This provides ventilation from heat, and a little light. Stain or paint only the outside of the box. If you use paint, lighter colours or white reflect more light and minimize summer heat in open sites. The entrance board should be rough on the inside so young birds can climb up to reach the hole. Wire mesh can be stapled to the inside, or a series of shallow, horizontal saw cuts made across it.
Most birds bring their own nest material.
Attaching the box Nest boxes can be attached to trees, poles, posts or to the side of a house. Nailing or drilling and screwing can be easily done on the extension piece. Attaching another longer piece of wood to the outside of the back wall. Hanging the box against a tree trunk or from a limb by means of a hook or hooks screwed into the top or sides of the box and the tree. Wiring the box from eyelets, nails or screws on the box to nails or screws in the tree or post.