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Sticker of Porcelain gray
Bug card No. 3398 of 4,939

Porcelain gray

Protoboarmia porcelaria
Eats: PlantsMothsForests and woods6 legs

The porcelain gray is a brownish grey moth with curved lines across its wings. Its caterpillar is a looper: it walks by pulling its back end up to its front, making a loop. It lives in forests full of fir and spruce trees.

Lives in
North America, mostly in the east and north-west
Wingspan
2.7 to 3 cm (1.1 to 1.2 in)
Top speed
about 12 km/h (7.5 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
Its caterpillars eat the needles of balsam fir, spruce and tamarack trees.
For real!Photo of Porcelain gray
Picture by Andy Reago & Chrissy McClarren. CC BY 2.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Porcelain gray 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 Porcelain gray compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

A female lays around 150 eggs on the needles in July.

2

The caterpillars sleep through the winter and wake up to eat in early spring.

3

The grown caterpillar is about 2.5 centimetres long with a Y shaped pattern on its back.

4

In the north there is one generation a year, in the south two.

you asked

Most asked questions about Porcelain gray

?What does the porcelain gray caterpillar eat?

Mainly the needles of fir, spruce and tamarack trees.

?Why is it called a looper?

Its caterpillar moves by making a loop with its body as it walks.

For bug experts

Scientific name
Protoboarmia porcelaria
Named by
Guenée, 1857
Group
Moths
Family
Geometridae
Classification
Insecta > Lepidoptera > Geometridae
Lives on
North America
Also known as
Dash-lined looper

Where the facts come from

  1. Protoboarmia porcelaria (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 Andy Reago & Chrissy McClarren. CC BY 2.0, 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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