Winter Roost Boxes. Chickadees, owls, and woodpeckers that remain in Alaska during winter use natural tree cavities and birdhouses as roosting sites. These roosting sites provide protection from wind and snow and extra insulation against the cold. Any birdhouse can provide a winter roost site if it is properly built, but better insulated birdhouses can also be constructed. Try placing perches on the inside of a birdhouse. During severe cold several chickadees sometimes share their body heat by roosting together in a single cavity.
Many birders enjoy having bird houses in their backyard to watch bird families as eggs are laid, chicks are hatched and fledglings are raised. It can be devastating, however, when tragedy befalls those feathered families, and hazards can come in many forms. Predators, poor climate and illness are just a few threats can all take a toll on backyard bird populations. These dozen tips for safer bird house designs can help turn the odds in favor of nesting birds’ survival by minimizing the greatest risks.