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Sticker of Large black slug
Bug card No. 0823 of 1,500

Large black slug

Arion ater
Eats: A bit of everythingSnails, slugs and wormsGardens and meadowsNo legsNot an insect, but a bug cousin

The large black slug is a big, shiny black slug with a bumpy back. It has no shell on its back, so it keeps safe with lots of slime.

Fun fact: this one is not an insect at all, it has no legs! But kids find it on every bug hunt, so it lives in Bug Wiki too.
Lives in
First from Europe, now also in Australia, Canada and the United States, in gardens, fields and woods
Length
10 to 15 cm (3.9 to 5.9 in)
Top speed
about 0.03 km/h (0.02 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. Its slime is very sticky, so wash your hands if you touch one.
What does it eat?
It eats almost anything: leaves, stems, mushrooms, dead plants, dung and even earthworms and dead animals.
For real!Photo of Large black slug
Picture by Cwmhiraeth. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Large black slug about 15 cm long (5.9 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)A house cat about 50 cm (20 in)
as long as 5 toy building bricks in a rowabout as long as your handneeds 2 minutes to cross a dinner table

How big is Large black slug compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Baby black slugs are brown or creamy white. They turn grey and then black as they grow up.

2

It can crawl up to 4.5 centimetres in a minute.

3

It makes three kinds of slime. Two help it slide along and stop it drying out, and one keeps hungry animals away.

4

It breathes through a little hole on the right side of its body.

5

Each slug is both a mum and a dad. From August to October it can lay up to 150 eggs every one to three weeks.

you asked

Most asked questions about Large black slug

?What does the large black slug eat?

Almost everything: plants, fungi, dead leaves, dung, dead animals and earthworms.

?How big is the large black slug?

It grows about 10 to 15 centimetres long when it stretches out.

?How long does a black slug live?

Usually about one year. It dies soon after laying its last eggs.

For bug experts

Scientific name
Arion ater
Named by
Linnaeus, 1758
Group
Snails, slugs and worms
Family
Arionidae
Classification
Gastropoda > Stylommatophora > Arionidae
Lives on
Europe, Australia and Oceania, North America
Also known as
Black slug, Black arion, European black slug

Where the facts come from

  1. Arion ater (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 Cwmhiraeth. CC BY-SA 3.0, 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: Snails, slugs and worms

Also at home here: Gardens and meadows