I finally got fed up with the birds crapping on my new car. I have power lines that run across the side of my driveway and through my backyard so the birds have been hanging out long before the Focus arrived. Not one to spend a small fortune at the car wash each week, I bought one of these and placed it on the post by my gate:
Before you laugh yourself right off your chair, I have to say there's been no new bird do-do on my car ever since this plastic hooter took up residence. Even Maggie barks at it, thinking it's real. I haven't seen a single bird perched on the overhead lines. I wish I'd done this years ago!