Avoid bird houses made of metal. Metal houses will become miniature ovens in summer heat, and reflective metals are highly visible to predators. The house can have metal guards or trim over a different material, however, such as a metal cover to fix an entrance hole to the proper size if needed. Healthy Houses: Bird houses can become crowded as nestlings grow, giving diseases and mites greater opportunities to spread to young birds. A safe bird house is one that takes into account the health of the birds.
The following information is meant to help you build birdhouses suitable for Alaskan birds. More information on birdhouses can be found at your local library or bookstore. Birds that nest in cavities are the only ones attracted to nest boxes. In Alaska, 30 bird species nest in cavities, and 21 of these will use birdhouses. Excepting Snow Buntings, which nest in natural and man_made cavities in tundra areas, most cavity_nesting birds prefer to nest in holes in trees.