use a shepards cane and put pie tins (the ones you get in the store not your good ones) use some kind of string and attache to the cans in front of window. My DH was having trouble with the small birds trying to make nests in garage he strung them along the bottom of garage door when it was open. They are persistent little things this year they built one in the back bumper of my truck, I guess I don't go very much