Thus, natural cavities are sparsely distributed, particularly in young forests, in areas with low woodpecker populations, and in areas where dead trees have been cut down. In these types of areas, cavity_nesting birds often have difficulty finding nesting and roosting sites and will readily use suitable birdhouses. Properly constructed birdhouses provide nesting and roosting birds the same protection as natural cavities in trees. This includes protection from wind, rain, cold, and nest predators (red squirrels, weasels, ravens, crows, jays, etc.).
Bluebird nest boxes should be placed in open areas like field edges on poles or fence posts 5┦ feet above the ground. This bird is found in only a limited area of east central Alaska and cannot be attracted in other areas. Swallow nest boxes should be placed in open areas including cities, field edges, open forests, lawns or gardens. Place the boxes 10┰ feet above the ground on posts, trees or beneath house eaves.