Flies are a type of insect from the Diptera order (derived from Greek, in the mean two and ptera means wings). Flies are generally regarded as dirty and disgusting animals, because they are identical to the source of illness. Its existence is often djauhi by humans, because it makes the atmosphere uncomfortable. 
Another obscure habit of flies is frequent bowel movements. Flies within a five-minute period, definitely defecate. In addition to eating, some flies that alight on food, usually also defecate, so potentially to spread the seeds of disease in the food. 