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Sticker of Nairobi fly
Bug card No. 0948 of 1,500

Nairobi fly

Paederus

The Nairobi fly is not a fly at all. It is a small, slim beetle with shiny blue or green wing cases and bright orange on its body. Its bright colours warn other animals to stay away.

Lives in
All over the world, in damp soil, fields and grassy places
Top speed
about 0.5 km/h (0.31 mph)
On foot, estimate
Can it hurt you?
Dangerous: look, do not touch
What does it eat?
Both the grown-ups and the larvae hunt other insects, including ones that eat crops.
For real!Photo of Nairobi fly
Picture by Jiaminglimjm. CC BY-SA 4.0, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

The skin rash often comes in a line, because people brush the beetle off and drag it across their skin.

2

The rash does not show up right away. It appears a day or so later.

3

It flies in the daytime and is drawn to bright lights at night.

4

There are more than 400 kinds of these beetles around the world.

you asked

Most asked questions about Nairobi fly

?What should you do if a Nairobi fly lands on you?

Gently blow it off or let it walk away, without squashing it. Then wash the skin with soap and water.

?Is the Nairobi fly a fly?

No. It is a kind of rove beetle, even though people call it a fly.

For bug experts

Scientific name
Paederus
Group
Beetles
Family
Staphylinidae
Classification
Insecta > Coleoptera > Staphylinidae
Lives on
Europe, Asia, Africa, North America, South America, Australia and Oceania

Where the facts come from

  1. Paederus (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 Jiaminglimjm. CC BY-SA 4.0, Wikimedia Commons. The round sticker of this bug is cut from the same 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.

More from the same group: Beetles

Also at home here: Gardens and meadows