Stork poop

OK, sounds gross, but it’s one of those questions you gotta ask!

Alsace and Southern Germany are filled with storks, as this snap of a village in Alsace shows:

But it makes you wonder: do storks poop into and onto their nests (as do many birds, such as pigeons), or do they keep their nests clean and make sure their body waste goes over the side, as this snap would seem to suggest: