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Sticker of Painted woodlouse
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Painted woodlouse

Porcellio spinicornis
Name means: “spinicornis refers to the spiny lobes at the front of its head”
Eats: Leftovers and dead thingsWoodliceGardens and meadows14 legsNot an insect, but a bug cousin

The painted woodlouse is a shiny woodlouse with two rows of yellow blotches on its back, as if someone had painted it. It can be grey, brown or yellowish, but its head and tail end are always dark. It comes out at night to munch dead leaves.

Fun fact: woodlice are not insects. They are crustaceans, cousins of crabs and shrimps, that live on land.
Lives in
All over Europe, and now also North America, in woods, grassland and rocky places
Length
1 to 1.5 cm (0.39 to 0.59 in)
Top speed
about 0.17 km/h (0.11 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting. Gently put it back where you found it.
What does it eat?
It eats dead plant bits like fallen leaves, twigs and bark, and helps turn them back into soil.
For real!Photo of Painted woodlouse
Picture by Gilles San Martin. CC BY-SA 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Painted woodlouse 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 rowit has about 14 legscould run across a dinner table in 21 seconds

How big is Painted woodlouse compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The mother carries her eggs and babies in a pouch full of liquid under her body, like a tiny built-in pond.

2

It is busy at night and hides during the day.

3

Some people keep it as a pet, because it comes in so many colours.

4

Even though it lives on land, a woodlouse is not an insect. It is related to crabs and shrimps.

you asked

Most asked questions about Painted woodlouse

?What does the painted woodlouse eat?

Dead leaves, twigs and bark. It is one of nature's recyclers.

?How big is a painted woodlouse?

About 10 to 15 millimetres long.

?Is a woodlouse an insect?

No. It has 14 legs and is related to crabs and shrimps.

For bug experts

Scientific name
Porcellio spinicornis
Named by
Say, 1818
Group
Woodlice
Family
Porcellionidae
Classification
Malacostraca > Isopoda > Porcellionidae
Lives on
Europe, North America

Where the facts come from

  1. Porcellio spinicornis (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 Gilles San Martin. CC BY-SA 2.0, 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