Crimson cars attract the most bird poop.
Adam Rifkin stashed this in Scatology
Ahem: "Researchers checked cars in five different U.K. cities, and determined that red cars were the most likely to be hit with bird droppings: 18 percent of them were marked. Blue and black were in second and third place, with a respective 14 and 11 percent. Green cars are apparently a total turn-off — only one percent were shit on."
My grey car attracts birds. Next time I'm getting green.