Works for keeping away pigeons woodpeckers crows ducks geese hawks seagulls sparrows grackles herons even squirrels and so on. Just say goodbye to them! Perfect alternative to ugly bird spikes netting and fake hawk owl. 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.