Wind spirals for scaring away birds. Are you tired of cheeky birds stealing your garden harvest or dirtying your balcony? Then the 12-piece set of bird repellent spirals is the solution. These bird deterrents effectively scare off birds by blinding them with reflected sunlight. This way, sparrows, blackbirds, pigeons, and other feathered friends will stay away from fruit trees and seeds in your garden or on your balcony in the future. The wind spirals simply need to be hung in the desired locations.