Attach this driftwood bird house to a window in your home and watch nature in action through the observation window. Three large suction cups hold the birdhouse firmly in place. Stylish driftwood siding and sturdy construction makes this a home any bird brain would be proud of. The rear of the home has a plexiglass panel for your viewing pleasure. This birdhouse weighs 2 pounds and measures 8.5 x 6.8 x 7.5 inches. The entry is 1 1/2 inches in diameter with a small perch.