Five years ago, I had just washed, waxed and done a full detail on my 911. I put the car cover on it, and was about to close the garage door. A dang (expletives deleted) bird flew in the garage, and had diarrhea or do what birds do.
I opened the other garage, door, and grabbed a broom and finally chased the dang thing out. It left me these presents on my car cover. It did not do anything the the El Camino or my wife's Macan. I had to strip off the car cover, and throw it in the washing machine.
It tried to get my clean car, but I put the car cover on just minutes before.