Since the dawn of man on earth, flies have been the bane of his existence. They have taken his blood, contaminated his food, transmitted his diseases, generally annoyed him and disturbed his peace of mind. Flies are the fourth largest order of insects on earth, totaling more than 160,000 species. A number of species can be found in urban environments, and a few species, including small flies and filth flies, are common pests in and around structures.
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