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At 2.5 cm long, the Delhi Sands flower-loving fly is one of the largest flies in the world. It is orange-brown and black with dark brown oval spots.
Currently 12 populations exist and this species is the only fly on the Endangered Species List. It was federally listed in 1993. Ninety-seven per cent of this species' habitat has been destroyed. Development, agricultural conversion, sand mining, invasion by exotic species, dumping of cow manure and trash, and off-road vehicles continue to threaten the species.