The common fly is not just a pest that breeds in dog waste and annoys human beings in their living rooms and at picnics. Flies are insects that play an important role in agriculture, in the food chain and in pollinating flowers. read more
Houseflies are decomposers. Various species break down decaying plant and animal matter and the incompletely digested nutrients in feces. Many also feed on the more primary decomposers, particularly yeasts. read more
The answer to that would be manifold, because there are many, many ecosystems around the world, with different taxa playing different roles of varying significance. read more
This includes not only the organic material in their houses and dumps, but also the fecal waste of their animals, such as cattle. Because Houseflies, unlike most Filth Flies, do not play a role in maintaining a natural ecosystem, they are considered pests. read more