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Sticker of Firebrat
Bug card No. 0513 of 1,500

Firebrat

Thermobia domestica

The firebrat is a small, fast, wingless insect, a close cousin of the silverfish. It has a long body that gets thinner at the end. As its name says, it loves heat and lives close to boilers, ovens and furnaces.

Lives in
Almost all over the world, outdoors under stones and leaves and indoors near warm places
Length
1 to 1.5 cm (0.39 to 0.59 in)
Top speed
about 1.1 km/h (0.68 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting, but it can get into food and nibble paper.
What does it eat?
It nibbles flour, pet food, starch and even the glue in book bindings. It also eats the shed skins and eggs of other firebrats.
For real!Photo of Firebrat
Picture by KyleCMSmith. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Firebrat about 1.5 cm long (0.59 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)
as long as 2.5 grains of rice in a rowcould run across a dinner table in 3.3 secondsmoves 20 times its own body length every second

How big is Firebrat compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

It feels best at 36 to 39 ยฐC, which is as warm as a person with a fever.

2

One female can lay up to 6000 eggs in her life.

3

It can live 3 to 5 years, which is long for such a small insect.

4

The babies look just like the grown-ups, only waxy white.

5

Firebrats like to stay together. Scientists think the smell of other firebrats' droppings tells them where their friends are.

you asked

Most asked questions about Firebrat

?Is a firebrat dangerous?

No. It does not bite and does not spread disease, but it can spoil food and paper.

?What is the difference between a firebrat and a silverfish?

They are close relatives and look alike, but the firebrat loves warm places like boiler rooms.

?How big is a firebrat?

It is about 1 to 1.5 centimetres long.

For bug experts

Scientific name
Thermobia domestica
Group
Other insects
Family
Lepismatidae
Classification
Insecta > Zygentoma > Lepismatidae
Lives on
Europe, Asia, Africa, North America, South America, Australia and Oceania

Where the facts come from

  1. Firebrat (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 KyleCMSmith. 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 hello@bugwiki.app and we will fix it.

More from the same group: Other insects

Also at home here: Houses and farms