Add Yahoo as a preferred source to see more of our stories on Google. A pigeon perches on an exterior windowsill of a brick-walled home. - Krblokhin/Getty Images We may receive a commission on ...

We may receive a commission on purchases made from links. It's not a pretty sight when you open your blinds to find a smattering of bird poop on a window pane. After pondering how a bird managed to ...