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Sticker of Giant pill millipede
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Giant pill millipede

Zoosphaerium neptunus
Eats: Leftovers and dead thingsCentipedes and millipedesRainforests and junglesLots of legsNot an insect, but a bug cousin

The giant pill millipede is shiny emerald green and the biggest pill millipede in the world. When it gets scared, it rolls up into a hard ball. A big one makes a ball as large as a baseball.

Fun fact: this one is not an insect. Insects have six legs, and this cousin has many, many more.
Lives in
Only in the rainforests of Madagascar, mostly in the north
Length
4.5 to 9 cm (1.8 to 3.5 in)
Top speed
about 0.3 km/h (0.19 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting, it just rolls up into a ball.
What does it eat?
It eats dead leaves and other rotting bits on the forest floor. That helps turn old leaves back into soil.
For real!Photo of Giant pill millipede
Picture by Julien Renoult. CC BY 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Giant pill millipede about 9 cm long (3.5 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)
as long as 3 toy building bricks in a rowit has about 42 legscould run across a dinner table in 12 seconds

How big is Giant pill millipede compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The girls grow twice as long as the boys, up to about 9 centimetres.

2

Girls have 21 pairs of legs and boys have 23 pairs.

3

Sometimes tens of thousands of them march together in a huge swarm, all walking the same way.

4

Such a swarm can be more than a kilometre long.

5

It lives for three to four years.

you asked

Most asked questions about Giant pill millipede

?How big is the giant pill millipede?

Boys are about 4.5 centimetres long and girls up to 9 centimetres. Rolled up, a big girl is the size of a baseball.

?What does the giant pill millipede eat?

It eats dead leaves and other rotting plant bits.

?Is the giant pill millipede dangerous?

No. It does not bite. It just rolls into a ball to protect itself.

For bug experts

Scientific name
Zoosphaerium neptunus
Named by
Butler, 1872
Group
Centipedes and millipedes
Family
Arthrosphaeridae
Classification
Diplopoda > Sphaerotheriida > Arthrosphaeridae
Lives on
Africa
Also known as
Emerald green giant pill millipede

Where the facts come from

  1. Zoosphaerium neptunus (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 Julien Renoult. CC BY 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: Centipedes and millipedes

Also at home here: Rainforests and jungles