Birds prefer to launch their droppings at white cars, according to a scientific study.
Student teacher Charles West, 37, carried out the survey for his department of education at Bristol University.
He enlisted the help of 40 researchers and counted bird droppings on 2,000 cars.
The team concluded that birds were less likely to dirty navy blue and black.
Bird expert Dr Derek Toomer said they might “bomb” white cars because they associate the color with predators.
He added: “Birds do respond to colors.”