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Sticker of Ailanthus silkmoth
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Ailanthus silkmoth

Samia cynthia
Name means: “named after the Ailanthus tree, the tree of heaven, which its caterpillars love to eat”
Eats: Nothing as a grown-upMothsGardens and meadows6 legs

The ailanthus silkmoth is a huge moth, with wings as wide as a grown-up's hand. Its brown wings have white and yellow stripes, a little half-moon spot on each wing and eye spots near the tips. Its caterpillars spin silk that people can use to make cloth.

Lives in
First from China and Korea, now also in Japan, Europe, America and Australia
Wingspan
11 to 12 cm (4.4 to 4.9 in)
Top speed
about 25 km/h (16 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It has no sting and cannot even bite, because it has no mouth parts.
What does it eat?
The grown-up moth has no mouth parts and cannot eat or drink at all. The caterpillars eat the leaves of the tree of heaven and other trees.
For real!Photo of Ailanthus silkmoth
Picture by No machine-readable author provided. Kugamazog~commonswiki assumed (based on copyright claims).. CC BY-SA 2.5, via Wikimedia Commons.

How big is it?

How wide are its wings?

Ailanthus silkmoth wings about 12 cm tip to tip (4.9 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)
wings as wide as your handcould fly across a whole football pitch in 15 seconds

How big is Ailanthus silkmoth compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Its caterpillars grow up to 7.5 centimetres long. They are whitish green with little white bumps along their back.

2

The young caterpillars stay together in a group, but the older ones live alone.

3

Its cocoon has a little escape hatch, so the moth can climb out easily.

4

One kind of it in India makes eri silk. Its silk is very strong, but it is spun like wool instead of being unwound from the cocoon.

5

Apart from the silkworm, its silkworm is the only one that is completely tame and raised by people.

you asked

Most asked questions about Ailanthus silkmoth

?How big is the ailanthus silkmoth?

Its wings are about 11 to 12.5 centimetres from tip to tip.

?What does the ailanthus silkmoth eat?

The grown-up moth cannot eat at all. The caterpillars eat leaves, mostly from the tree of heaven.

?Is the ailanthus silkmoth dangerous?

No. It is completely harmless.

For bug experts

Scientific name
Samia cynthia
Named by
Drury, 1773
Group
Moths
Family
Saturniidae
Classification
Insecta > Lepidoptera > Saturniidae
Lives on
Asia, Europe, North America, South America, Australia and Oceania, Africa
Also known as
Eri silkmoth

Where the facts come from

  1. Samia cynthia (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 No machine-readable author provided. Kugamazog~commonswiki assumed (based on copyright claims).. CC BY-SA 2.5, 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: Gardens and meadows