Yes, there was actually a study done on the propensity of birds to make messy on various colors of automobiles in the UK, and ornithological scatophiliacs have come to the conclusion that 60% of birds choose to defecate on cars painted white. No joke, this study apparently debunks a myth that "Seagulls went for blue cars as they reminded them of the sea." Ironically, our family preferred to purchase and/or repaint cars white because they supposedly were easier to keep clean.
Birds 'target' white cars [News.com.au]
Italy's Supreme Court Paves Way For Jail Time in Double-Parking Cases [Internal]