The World Conservation Union (IUCN) lists seven species of dipterans. Three species are listed as Extinct, or no longer in existence. The sugarfoot moth fly from the United States and the giant torrent midge from Australia are both listed as Endangered, or facing a very high risk of extinction in the wild. The Tasmanian torrent midge from Australia is listed as Critically Endangered, or facing an extremely high risk of extinction in the wild, because of the construction of a hydroelectric dam in its habitat. Belkin's dune tabanid fly, a horse fly from Mexico and the United States, is considered Vulnerable, or facing a high risk of extinction in the wild, because its habitat is being destroyed by development. The Endangered Delhi Sands flower-loving fly is the only fly listed by the United States Fish and Wildlife Service. Its habitat is disappearing due to development and is also being destroyed by trash dumping and pesticide use.
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