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Sticker of Hermit beetle
Bug card No. 0730 of 1,500

Hermit beetle

Osmoderma eremita
Eats: WoodBeetlesForests and woods6 legs

The hermit beetle is a big, shiny, dark beetle that lives in old hollow trees. Its babies grow up inside the soft, crumbly wood deep in the tree. It is rare, and many countries in Europe protect it.

Lives in
Central and western Europe, in old forests and parks with big hollow trees
Length
2.1 to 3.2 cm (0.83 to 1.3 in)
Top speed
about 0.73 km/h (0.45 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting. It is protected, so leave it where you find it.
What does it eat?
Its larvae live inside hollow trees and eat the old, rotting wood there.
For real!Photo of Hermit beetle
Picture by Siga. Public domain, via Wikimedia Commons.

How big is it?

How long is it?

Hermit beetle about 3.2 cm long (1.3 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 5 grains of rice in a rowcould run across a dinner table in 4.9 seconds

How big is Hermit beetle compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

It likes old oak trees best, but any tree with a good hollow can be its home.

2

In Italy, specially trained sniffer dogs help scientists find its larvae inside trees.

3

It is the best studied of all the insects that live in old hollow trees.

4

It has become rare because many old hollow trees have been cut down, so the European Union gives it top protection.

you asked

Most asked questions about Hermit beetle

?Is the hermit beetle rare?

Yes. It has become rare across Europe and is protected in most European countries.

?Where does the hermit beetle live?

Inside old hollow trees, mostly oaks, in Europe.

?How big is a hermit beetle?

About 2 to 3 centimetres long.

For bug experts

Scientific name
Osmoderma eremita
Group
Beetles
Family
Scarabaeidae
Classification
Insecta > Coleoptera > Scarabaeidae
Lives on
Europe
Also known as
Russian leather beetle

Where the facts come from

  1. Osmoderma eremita (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 Siga. Public domain, 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: Forests and woods