Sewer Fly

These flies get the common name of moth fly from their fuzzy appearance, their bodies and wings being very hairy. The drain/filter/sewage fly common names are from places or situations which represent typical breeding and developmental sites. Although usually thought of as nuisance pests, there have been cases where inhalation of their body parts caused bronchial asthma. Moth flies are found throughout the United States and most of the world.

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Fungus Gnat

The common name of gnat is applied to certain small flies, and that of fungus comes from their common occurrence on fungi which serve as a major food source for their larvae; dark-winged describes the smoke-colored wings commonly found within the Sciaridae. These flies are nuisance pests in and around structures, but a few species are agricultural pests. For the Sciaridae, about 137 species, and for the Mycetophilidae, about 714 species, are found in the United States and Canada.

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Fruit-Vinegar Fly

The common name of small fruit fly comes from their small size and fondness for fruits as egg laying and development sites. The name of vinegar fly comes from the fact they develop in the briny or vinegar-like liquids at the top of imperfectly sealed canned fruits and vegetables. Note that only flies of the family Tephritidae can properly be called fruit flies. These are nuisance pests but may act as disease vectors. The best known of these flies is D. melanogaster Meigen which has been used extensively in the study of heredity. They are worldwide in distribution and are found throughout the United States.

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Phorid/Humpbacked/Scuttle Fly

The common name of humpbacked fly comes from their humpbacked profile when viewed from the side which is due to the small head and prominent pronotum, while that of scuttle fly refers to their habit of running about in an active erratic manner. Phorids are mainly nuisance pests but there are cases of larval infestation of wounds, intestines, and eyes of humans. Worldwide there are over 2,500 species known, while about 226 are currently recognized in the United States and Canada.

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