<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Why are pigeons such dirty animals?
<|assistant|>
Pigeons are often considered dirty animals because they commonly inhabit cities and are thought to deposit feces on sidewalks, cars, and buildings. Additionally, their droppings can be an asthma trigger and a source of germs and bacteria. Their habit of roosting in the same spot can also leave behind bird mites, which are annoying and itchy. Finally, some species of pigeons can spread disease-causing organisms through their droppings.