While walking back to my gem's car from class today, I noticed something odd on the rear window of the car next to her's. There was a bird's leg on it. It had feathers and blood and appeared to have been ripped off of a bird. There was also a lot of bird shit on the car... I think perhaps this was a warning from the car's owner to other birds. "This bird shit on my car. Would you like to try it too?" Quite odd though.

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Sorry for the image quality; it was taken with a phone.