Bug Wiki
Sticker of Southern pill woodlouse
Bug card No. 4032 of 4,939

Southern pill woodlouse

Armadillidium depressum
Eats: Leftovers and dead thingsWoodliceHouses and farms14 legsNot an insect, but a bug cousin

The southern pill woodlouse is a big dark grey woodlouse. It can roll itself into a ball when it is scared. Its back end spreads out wide, which makes it look a bit flat and splayed.

Fun fact: woodlice are not insects. They are crustaceans, cousins of crabs and shrimps, that live on land.
Lives in
Southwest Britain and some English towns, on old walls and under stones
Length
2 cm (0.79 in)
Top speed
about 0.19 km/h (0.12 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
It eats dead plants and rotting leaves, like other woodlice.
For real!Photo of Southern pill woodlouse
Picture by Anders Sandberg from Oxford, UK. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Southern pill woodlouse about 2 cm long (0.79 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 3 grains of rice in a rowit has about 14 legscould run across a dinner table in 19 seconds

How big is Southern pill woodlouse compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

When it rolls up, it leaves a little gap, so it is not a perfectly closed ball.

2

It can live for about 3 years.

3

It likes to live near people, on walls of old houses and under stones in towns.

4

You can see it all year round.

you asked

Most asked questions about Southern pill woodlouse

?Can the southern pill woodlouse roll into a ball?

Yes. It rolls up when it is disturbed, but it leaves a small gap.

?How big is the southern pill woodlouse?

It can be up to 2 cm long, which is big for a woodlouse.

For bug experts

Scientific name
Armadillidium depressum
Group
Woodlice
Family
Armadillidiidae
Classification
Malacostraca > Isopoda > Armadillidiidae
Lives on
Europe

Where the facts come from

  1. Armadillidium depressum (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 Anders Sandberg from Oxford, UK. CC BY 2.0, 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.

Bug Wiki honey jar For grown-ups: Bug Wiki is free, with no ads and no tracking. A small tip helps keep it online.Leave a tip

More from the same group: Woodlice

Also at home here: Houses and farms

Honey jarfor grown-ups