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Sticker of Gum leaf skeletoniser
Bug card No. 2141 of 4,939

Gum leaf skeletoniser

Uraba lugens
Eats: PlantsMothsForests and woods6 legs

The gum leaf skeletoniser is a grey moth from Australia. Its yellow and black caterpillar has a funny nickname: the mad hatterpillar. Every time it grows, it keeps its old head skin on top, so it wears a tall stack like a hat.

Lives in
Australia and New Zealand, in eucalyptus trees
Wingspan
2.5 to 3 cm (0.98 to 1.2 in)
Top speed
about 12 km/h (7.5 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless if you just watch it. Do not touch the hairy caterpillars.
What does it eat?
The caterpillars chew the leaves of gum trees, also called eucalyptus.
For real!Photo of Gum leaf skeletoniser
Picture by Birgit E. Rhode, Landcare Research New Zealand Ltd.. CC BY 4.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Gum leaf skeletoniser wings about 3 cm tip to tip (1.2 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)
wings as wide as 5 grains of rice in a rowcould fly across a whole football pitch in 32 seconds

How big is Gum leaf skeletoniser compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Each old head shell is a bit bigger than the last, so the hat stack grows taller and taller.

2

A mother lays 100 to 200 eggs together. Each egg is only about 1 millimetre wide.

3

It turned up in Auckland, New Zealand, in 2001, where it is a pest.

4

Scientists brought tiny wasps from Australia to New Zealand to help keep it in check.

you asked

Most asked questions about Gum leaf skeletoniser

?Why is it called the mad hatterpillar?

Because it keeps its old head skins piled on top of its head like a tall hat.

?What does the gum leaf skeletoniser eat?

Its caterpillars eat eucalyptus leaves.

For bug experts

Scientific name
Uraba lugens
Group
Moths
Family
Nolidae
Classification
Insecta > Lepidoptera > Nolidae
Lives on
Australia and Oceania
Also known as
Mad hatterpillar

Where the facts come from

  1. Uraba lugens (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 Birgit E. Rhode, Landcare Research New Zealand Ltd.. CC BY 4.0, 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.

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More from the same group: Moths

Also at home here: Forests and woods

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