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Sticker of Superworm
Bug card No. 1315 of 1,500

Superworm

Zophobas atratus
Eats: Leftovers and dead thingsBeetlesRainforests and jungles6 legs

The superworm is not a worm at all. It is the big, wriggly larva of a black darkling beetle. It looks like a giant mealworm with dark ends, and pet owners feed it to lizards, frogs and birds.

Lives in
The tropics of Central and South America, and in pet shops around the world
Length
5 to 6 cm (2 to 2.4 in)
the larva
Top speed
about 1 km/h (0.62 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. A superworm may nip if you squeeze it, but the bite does not hurt much.
What does it eat?
It eats plant food and leftovers. Amazingly, it can also chew up and digest polystyrene foam, the white stuff used in packaging.
For real!Photo of Superworm
Picture by Brian Gratwicke. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Superworm about 6 cm long (2.4 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 2 toy building bricks in a rowcould run across a dinner table in 3.6 seconds

How big is Superworm 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 is ready to change, it curls into a stiff C shape before it becomes a pupa.

2

If superworms are kept close together with lots of food, they wait longer before turning into beetles.

3

It can live for one to two weeks without eating.

4

The grown-up beetles can let out a stinky smell when they are bothered.

5

Tiny helpers in its tummy help it break down plastic foam.

you asked

Most asked questions about Superworm

?Is a superworm a worm?

No. It is the larva of a darkling beetle. When it grows up, it turns into a black beetle.

?Do superworms bite?

They can give a little nip if they are handled roughly, but it is not very painful.

?Can superworms really eat plastic?

Yes, they can chew and digest polystyrene foam, with help from tiny bacteria in their gut.

For bug experts

Scientific name
Zophobas atratus
Group
Beetles
Family
Tenebrionidae
Classification
Insecta > Coleoptera > Tenebrionidae
Lives on
North America, South America
Also known as
Giant mealworm beetle, Kingworm, Barley worm, Morio worm

Where the facts come from

  1. Zophobas atratus (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 Brian Gratwicke. CC BY 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: Beetles

Also at home here: Rainforests and jungles