Wind spirals to deter birds. Are you tired of cheeky birds stealing your garden harvest or dirtying your balcony? Then the bird repellent spirals in a set of 12 are the solution. These bird deterrents effectively scare away birds by blinding them with reflective 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.