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Sticker of Black fly
Bug card No. 0403 of 4,939

Black fly

Simulium
Eats: BloodFlies and mosquitoesPonds, rivers and shores6 legs

Black flies are tiny dark flies that live near rivers and streams. There are almost 2,000 different kinds.

Lives in
Many parts of the world, near rivers and streams
Top speed
about 8 km/h (5 mph)
Flying, estimate
Can it hurt you?
Dangerous: look, do not touch
Some black flies spread serious illnesses, like river blindness, and many bites can make people sick. Keep them away with clothes and bug spray, do not swat them on your face, and tell a grown-up if you get lots of bites.
What does it eat?
The females drink blood from people and animals. They cut a little hole in the skin and lap up the blood.
For real!Photo of Black fly
Picture by United States Department of Agriculture. Public domain, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

Their spit stops blood from clotting, so they can keep drinking.

2

An old legend from Serbia says a swarm of black flies came out of a cave where a monster lay.

3

One kind was such a pest in the 1700s that people near the Danube river still tell stories about it.

you asked

Most asked questions about Black fly

?Where do black flies live?

Near rivers and streams in many parts of the world.

For bug experts

Scientific name
Simulium
Named by
Latreille, 1802
Group
Flies and mosquitoes
Family
Simuliidae
Classification
Insecta > Diptera > Simuliidae
Lives on
Europe, Asia, Africa, North America, South America, Australia and Oceania
Also known as
Blackfly

Where the facts come from

  1. Simulium (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by United States Department of Agriculture. Public domain, Wikimedia Commons. The sticker of this bug is drawn from this picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

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More from the same group: Flies and mosquitoes

Also at home here: Ponds, rivers and shores

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