Works for keeping away pigeons, woodpeckers, crows, ducks, geese, hawks, seagulls, sparrows, grackles, herons, even squirrels and so on. Just say goodbye to them! Can be used alongside or alternately with bird spikes, bird netting and false eagle owls. The best gift for farmer, gardener or any friend who wants to keep birds away!Every harvest season, you may worry about birds destroying your crops and droppings landing on balconies, swimming pools and other places. So give it a try, this bird windmill will keep birds away from your house, garden, roof, window and car.