Is it possible for bird poo to be black - as i have what looks like black bird poo on my car,splashed over it.cant decide whether its that or someones deliberately splashed my car with mud - NEIGHBOURS FROM HELL.
Yes, it can be any colour, depending on what they've eaten - in Sunderland town centre where I work, it's usually the colour of curry sauce; where I live it's usually the colour of berries! You could sniff it and lick it to check if it's mud....
Thank you to everyone for their advice - unfortunately, this was a SERIOUS question - the BLACK substance does seem very easy to remove,unlike bird poo.