My office is directly under a pylon and every day my car is subject to a battering from the birds that sit on it all day to the point where i now have to wash it daily How can i ward them off?

My office is directly under a pylon and every day my car is subject to a battering from the birds that sit on it all day to the point where i now have to wash it daily How can i ward them off?
Best effect: Climb the pylon and glue tacks together all over top very close together.
"best effect" puts HOLES on the feet of the birds. they use their feet to hold onto things and some use them to eat. how about we put some holes in rob's feet?
a moving wind vane or some other motion object will work HUMANELY.
rob, you are a dick! mcgtrinsofla