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Sticker of Giant wood moth
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Giant wood moth

Endoxyla cinereus
Eats: Nothing as a grown-upMothsForests and woods6 legs

The giant wood moth is the heaviest moth in the world. It can weigh as much as 30 grams, which is like six sugar cubes. Its baby, a big caterpillar, lives for years inside a tunnel in a eucalyptus tree.

Lives in
Eastern, southern and southwestern Australia, in eucalyptus forests
Wingspan
23 cm (9.1 in)
Top speed
about 34 km/h (21 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting, it does not even have a mouth.
What does it eat?
The grown-up moth has no mouth and cannot eat at all, it lives on fat it saved as a caterpillar. The caterpillar eats the inside of eucalyptus trees.
For real!Photo of Giant wood moth
Picture by Greg Tasney. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Giant wood moth wings about 23 cm tip to tip (9.1 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)
wings as wide as your handcould fly across a whole football pitch in 11 seconds

How big is Giant wood moth compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Its wings are about 23 centimetres across, wider than a sheet of paper.

2

The caterpillar starts only 1.5 millimetres long but grows to about 15 centimetres, as long as a pencil.

3

The caterpillar lives about three years inside its tree tunnel before it turns into a moth.

4

It closes the door of its tunnel with a plug made of silk and wood bits.

5

In 2021 one was seen at a school in Australia and it made the news all the way in the New York Times.

you asked

Most asked questions about Giant wood moth

?How big is the giant wood moth?

Its wings are about 23 centimetres across, and it can weigh up to 30 grams. It is the heaviest moth in the world.

?What does the giant wood moth eat?

The grown-up moth has no mouth and eats nothing. The caterpillar eats the wood inside eucalyptus trees.

?Is the giant wood moth dangerous?

No, it is completely harmless.

For bug experts

Scientific name
Endoxyla cinereus
Named by
Tepper, 1890
Group
Moths
Family
Cossidae
Classification
Insecta > Lepidoptera > Cossidae
Lives on
Australia and Oceania

Where the facts come from

  1. Endoxyla cinereus (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 Greg Tasney. CC BY-SA 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: Moths

Also at home here: Forests and woods