The important thing with birdypoo is to get it off asap, because it has the potential to stain if full of berry dye,(seasonal variations)- or bleach. It's worth carrying some wet wipes if you leave it outside away from home with the hood up.
Just to back that up Dave, the alkaline content of it- with or without berry content- can also play hell with paintwork and lead to discolouring, so another reason to get the stuff off asap
G
