Having been in the car wash business all my life, I always noticed the biggest bird droppings on white cars. Of course there are more white cars then any other color. I also found yellow vehicles had more bird droppings than normal. I had once or twice tried to put myself in the birds position and thought if I was rolling in for a bomb run in a parking lot or flying over a highway trying to hit an enemy insurgent Honda, which car would be easiest? Most of us would assume a red car or some other color, but in fact the birds seem to like to make their bombing runs on white cars?
A study by a student named Charles West from Bristol University in the United Kingdom did a study with 1760 cars and learned that most often the birds made their decision based on the color of their cars and white being the favored color to dive-bomb. The birds attempted to hit the cars and had a 70% kill ratio of landing the turd on the car they tried for. Some birds did not have the bombing skills of our current net-centric Predator UAVs with smart munitions.
This study debunked on old wives