There are 5,200 species worldwide; all are predators and all exist in a variety of habitats. The adults are the primary predators of other flies.
Most of us know that this fly is not something we want around our foods. The World Health Organization states that diseases carried from these flies kill and sicken more children in the world than any other disease. Marshall states that “a hundred species of parthogenic molecules have been isolated from their digestive tracts, a disturbing statistic considering that these flies routinely regurgitate on their food (and our food!).”
This family of insects develop a high-resistance to insecticides. They do this if there is not a complete kill. Those that survive produce offspring that resist that particular chemical cocktail and eventually they come back en masse again.
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