Those of us interested in wildlife can help avoid conflicts, which always end up with the moose or bears as the losers. To protect wildlife and keep problems from arising, either locate feeders out of reach of moose and bears, or put up feeders after bears are hibernating (Nov. 1) and take them down before bears begin to wake up in spring (mid_March). Don't feed birds in any way that will harm them. Keep feeders clean, and clean up the area on the ground around feeders that may attract other wildlife species to feeders.
Provide ventilation. Drill small holes ƑǞ to 1ǚ_inch diameter) through each side of the birdhouse just below the roof. This will provide better air circulation. Do NOT add perches. Perches allow predatory birds (like jays, magpies, ravens, and crows) better access to the eggs and young in a nest box. In contrast, cavity_nesting birds rarely use perches and prefer cavities without perches.