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Sticker of Stout's hardwood borer
Bug card No. 4173 of 4,939

Stout's hardwood borer

Polycaon stoutii
Eats: WoodBeetlesForests and woods6 legs

Stout's hardwood borer is a black, hairy beetle shaped like a little tube. It spends most of its life hidden inside wood. A grown-up beetle is about 1 to 2 centimetres long.

Lives in
Western North America, from British Columbia down the Pacific coast to Arizona
Length
1 to 2.3 cm (0.39 to 0.91 in)
Top speed
about 0.62 km/h (0.39 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It is only interested in wood.
What does it eat?
Its young live inside wood and eat their way through it.
For real!Photo of Stout's hardwood borer
Picture by Sarah McCaffrey, Museum Victoria. CC BY 3.0 au, via Wikimedia Commons.

How big is it?

How long is it?

Stout's hardwood borer about 2.3 cm long (0.91 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 4 grains of rice in a rowcould run across a dinner table in 5.8 seconds

How big is Stout's hardwood borer compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

The mother chews a tunnel into wood and lays her eggs inside it.

2

Its young can stay inside the wood for more than 20 years before they come out as beetles.

3

Sometimes a grown beetle even crawls out of wooden furniture.

4

It usually picks dead or dying trees, such as oak, maple, redwood and fruit trees.

5

It has travelled to new places hidden in wood that people ship around.

you asked

Most asked questions about Stout's hardwood borer

?Can a beetle come out of wooden furniture?

Yes. The young of Stout's hardwood borer can grow inside wood, and sometimes a beetle crawls out of a piece of furniture.

?How long does Stout's hardwood borer live inside wood?

At least a year, and sometimes more than 20 years before it comes out as a beetle.

For bug experts

Scientific name
Polycaon stoutii
Group
Beetles
Family
Bostrichidae
Classification
Insecta > Coleoptera > Bostrichidae
Lives on
North America
Also known as
Black polycaon, Stout's branch borer

Where the facts come from

  1. Polycaon stoutii (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 Sarah McCaffrey, Museum Victoria. CC BY 3.0 au, 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: Beetles

Also at home here: Forests and woods

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