This one pack is great for balconies or similar sized areas.
Visual Bird, Woodpecker, Swallow Repellent (Patent Pending) Fluttering, colors and sounds mimic strike movements of predatory birds. No batteries, cords, or other maintenance requirements. Small 2×6 inch reflectors are wind operated, easy to install and durable. Comes ready to install with manufactured support wire, all you need is a hammer and a few nails. Directions included. So simple most people can’t believe it actually works. Major pest control companies use this product. If they use it, then you know it works!
Note: Avoid attaching to metal chimney caps as sound from spinning flasher may carry through structure.