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exists and is an alternate of . The correct term is Guano. It is the feces and urine of seabirds, cave-dwelling bats, and seals. Guano manure is a highly effective fertilizer due to its high phosphorus and nitrogen content and its relative lack of odor compared to other forms of organic fertilizer such as horse manure.
Here you can see bat droppings sized by a pen. Bat droppings (guano) are very dangerous to humans. They looks similar to mouse droppings, but when touched they break apart into a powdery substance. This powder then becomes airborne, and once inhaled it can cause a terrible respiratory disease called Histoplasmosis. Histoplasmosis is the most severe danger of bat droppings, but disease is not the only risk.