PetsN'all Real Wood Bird Nest Box with Transparent Window Lightweight & durable paulownia wood for season after season use. Proper ventilation and drainage to keep the inside of the bird house comfortable for feathered guests. Stable mounting with 4 suction cups holds the bird house in place through all types of weather. Easily attaches to any window, giving you a clear view of the bird family raising their babies from egg to flight. Viewing window easily removed for cleaning after the bird family moves out for the season.