This 1 9/16 in. opening portal is the ideal size for Western Bluebirds and others. Also works well for Eastern Bluebirds. They prevent unwanted birds from enlarging entrance openings on bird houses.
This 1 9/16 in. opening portal is the ideal size for Western Bluebirds and others. Also works well for Eastern Bluebirds. They prevent unwanted birds from enlarging entrance openings on bird houses.