Bird poop can be any color. Even black like the time my car got attacked by a bunch of birds. I was driving home from work that day. I stopped at a light. All of a sudden I hear "thud, thud, thud, thud, thud....." It was like someone threw a bunch of marbles into the air and they all came down on my car. It was LOUD.
I didn't know what it was at first. I started looking around and then I looked up and see a bunch of birds sitting above my car on the electrical lines. I thought, "Oh, great." I didn't know how bad I was attacked until I got home. My whole roof was covered in black poop.
Of course, I washed the entire car right then and there.
