Black Fly

Also called  buffalo gnat , or  turkey gnat  any member of the insect family Simuliidae (order Diptera), usually black or dark gray. About 300 species of worldwide distribution are known. The black fly is small and humpbacked, with gauzy wings, stout antennae and legs, and rather short mouthparts adapted for sucking blood. The females bite and are sometimes so abundant that they may kill chickens, birds, and other domestic