I left my car at my mom's place to fly to India, her townhouse has 2 parking spaces, one is directly under a tree, I parked in that one.
In the 3 weeks the car was parked it apparently got absolutely covered with so much bird shit you couldn't see through the windshield, Rain had gotten most of it off by the time we got back home. Neighbors told us about that insanity.
Went to the car wash, cleaned as best I could, and started parking in the second parking spot — ever since then there is NO pile of shit in the parking space under the tree.
So it's not like that was a natural spot the birds liked to shit — they were doing it specifically to fuck with the car. They know what they're doing.