"The research also showed birds can be selective about the cars they hit.

Just 86 per cent of drivers of green cars have been hit by bird droppings in the last year, compared to 92 per cent of drivers of silver cars. Green car drivers are also hit less often".*source


On relection, I am not so sure that cats can elimate the "big shitters"...pigeons and seagulls? I suspect most cats focus on the "small shit" varieties,which likely do less harm.