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See black fly.
(Animals) any of various small North American blood-sucking dipterous insects of the genus Simulium and related genera: family Simuliidae. Also called: black fly
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|Noun||1.||buffalo gnat - small blackish stout-bodied biting fly having aquatic larvae; sucks the blood of birds as well as humans and other mammals|
gnat - any of various small biting flies: midges; biting midges; black flies; sand flies