The ‘crow’ bird defense system is used to repel pigeons, blackbirds, chickadees and other small birds. Natural pest control. Clean windowsills and gardens. Weatherproof plastic bird guard. Extra decorative design for balcony or garden Crows are the natural enemies of ‘cherry eaters’ and pigeons staining our windowsills. Just stick it where unwanted, troublesome grapes or greedy starlings are perched to quickly scare them away in an animal-friendly way. Its shape, size and color perfectly mimic a real crow, so it is considered the best bird scarer. With this simple way you can fight annoying bird droppings on your balcony, in our gazebo or on your cart. Individual birds are hunted differently than entire flocks. If you want to hunt a whole bird, we recommend that you buy at least three artificial birds. Flocks give birds a greater sense of security, which means a false crow isn’t enough of a deterrent.