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Sticker of Nosy pill woodlouse
Bug card No. 0973 of 1,500

Nosy pill woodlouse

Armadillidium nasatum
Eats: Leftovers and dead thingsWoodliceGardens and meadows14 legsNot an insect, but a bug cousin

The nosy pill woodlouse is a big, dark grey woodlouse with a funny little square bump on the front of its head, like a nose. That is how it got its name. When it is scared it curls up, but not into a perfect ball like its cousins.

Fun fact: woodlice are not insects. They are crustaceans, cousins of crabs and shrimps, that live on land.
Lives in
Western Europe, including southern England and Ireland. People also brought it to North America
Length
2.1 cm (0.83 in)
up to
Top speed
about 0.2 km/h (0.12 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
Like other woodlice, it eats dead leaves, rotting wood and other bits of dead plants.
For real!Photo of Nosy pill woodlouse
Picture by Ilona Loser. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Nosy pill woodlouse about 2.1 cm long (0.83 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 rowit has about 14 legscould run across a dinner table in 18 seconds

How big is Nosy pill woodlouse compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

It likes drier places than most woodlice.

2

It is often found near people, on railway lines and on empty building land.

3

When it rolls up, it leaves a little gap, so it never becomes a complete ball.

4

Some have pale stripes running from head to tail, but not all of them do.

5

Like other woodlice, it hides under stones and pieces of wood.

you asked

Most asked questions about Nosy pill woodlouse

?Why is it called the nosy pill woodlouse?

Because it has a square bump on the front of its head that looks like a little nose.

?Can the nosy pill woodlouse roll into a ball?

Almost. It curls up, but it does not close into a full ball like the common pill woodlouse.

?Is the nosy pill woodlouse harmful?

No. It is harmless and helps clean up dead plants.

For bug experts

Scientific name
Armadillidium nasatum
Named by
Budde-Lund, 1885
Group
Woodlice
Family
Armadillidiidae
Classification
Malacostraca > Isopoda > Armadillidiidae
Lives on
Europe, North America

Where the facts come from

  1. Armadillidium nasatum (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 Ilona Loser. 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: Woodlice

Also at home here: Gardens and meadows