Many species of birds require a hole in a tree, known as a "tree cavity," in order to build a nest and raise young. Birds such as bluebirds, owls, woodpeckers, and chickadees cannot build a nest unless they find the right size cavity and entrance hole. Since people don't like to leave dead trees standing, cavities for nests are not as plentiful as they once were. We can help our feathered friends by building and maintaining homes for them around our yard, school, a local park, farm or business property.
Below are plans for three sizes of bird houses, or "nest boxes." Also included is a plan for a shelf for birds (like robins) who prefer a nesting platform. Note that the size of the entrance hole if very important, and must be as exact as possible.