4000 spots of human faeces found on streets from january to june this year, to be exact. there's a mobile app for tracking that, and it's called hotpads.
the clue is in the content. if it's a combo of meat, carb, and vege, it's human. if there's hardly vege content in it, it's most likely dog or cat. if it's full of cum, it's definitely gay. :o