About Black Fly
Black flies (family Simuliidae) are 1–5 mm humpbacked flies that breed in fast-flowing, oxygen-rich streams. Females are vicious biters that swarm in clouds in late spring across northern regions, causing severe blood loss in livestock and driving animals into frenzied panic. Their blade-like mouthparts create bleeding wounds that itch intensely and can produce toxic reactions in sensitive hosts. In sub-Saharan Africa and Central America, the black fly Simulium damnosum transmits the parasitic filarial worm Onchocerca volvulus, causing river blindness (onchocerciasis) in millions of people.
Geographic Distribution
This insect is found across Asia, with notable populations in China and surrounding regions.
Management
If you suspect a Black Fly problem, consult our recommended exterminator services or browse our full pest species database for related species and control guidance.