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Sticker of Common bagworm moth
Bug card No. 0988 of 4,939

Common bagworm moth

Psyche casta
Eats: PlantsMothsGardens and meadows6 legs

The common bagworm moth has a very strange family. The father is a small furry brown moth with shiny wings. The mother looks like a little grub: she has legs but no wings at all. Its caterpillar builds itself a tiny protective tube out of bits of grass.

Lives in
Europe and Asia, and brought to North America
Wingspan
1.2 to 1.5 cm (0.47 to 0.59 in)
males only, females have no wings
Top speed
about 8.6 km/h (5.3 mph)
Flying, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting.
What does it eat?
Its caterpillars eat grasses and the leaves of birch, willow, poplar and blueberry plants.
For real!Photo of Common bagworm moth
Picture by Svdmolen. CC BY 2.5, via Wikimedia Commons.

How big is it?

How wide are its wings?

Common bagworm moth wings about 1.5 cm tip to tip (0.59 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)
could fly across a whole football pitch in 44 seconds

How big is Common bagworm moth compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

The male flies at night, from May to July.

2

The caterpillar carries its grass case around with it, like a snail carries its shell.

3

The female is yellowish or light brown with a few dark brown plates on her back.

you asked

Most asked questions about Common bagworm moth

?Can the female bagworm moth fly?

No. The female has legs but no wings, so she cannot fly.

?What does a bagworm caterpillar do?

It makes a little case from grass to hide in and eats grasses and leaves.

For bug experts

Scientific name
Psyche casta
Group
Moths
Family
Psychidae
Classification
Insecta > Lepidoptera > Psychidae
Lives on
Europe, Asia, North America

Where the facts come from

  1. Psyche casta (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 Svdmolen. CC BY 2.5, 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

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