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Sticker of Poison hemlock moth
Bug card No. 3380 of 4,939

Poison hemlock moth

Agonopterix alstroemeriana
Eats: PlantsMothsGardens and meadows6 legs

The poison hemlock moth is a small, pale brown moth with a reddish spot in the middle of each wing. Its caterpillars live on poison hemlock, a very poisonous plant, and nibble it without getting sick. People even use this moth to help control the dangerous plant.

Lives in
Native to Europe, now also in the northern United States, southern Canada, New Zealand and Tasmania
Wingspan
1.7 to 1.9 cm (0.67 to 0.75 in)
Top speed
about 9.6 km/h (6 mph)
Flying, estimate
Can it hurt you?
Harmless
The moth is harmless. The plant it lives on, poison hemlock, is very poisonous, so never touch or taste that plant.
What does it eat?
Its caterpillars eat only poison hemlock, munching its leaves, flowers and seed heads.
For real!Photo of Poison hemlock moth
Picture by dhobern. CC BY 2.0, via Wikimedia Commons.

How big is it?

How wide are its wings?

Poison hemlock moth wings about 1.9 cm tip to tip (0.75 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 39 seconds

How big is Poison hemlock moth compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

The caterpillar rolls a hemlock leaf into a tube with its silk and hides inside.

2

If something attacks it, the caterpillar wriggles out of its tube and drops to the ground to escape.

3

The poison from the plant may help protect the caterpillars from hungry animals.

4

The grown-up moth can live from June until the next March, which is very long for a moth.

5

In winter it sometimes hides under the bark of firewood and flies out when the wood is brought into a warm house.

you asked

Most asked questions about Poison hemlock moth

?What does the poison hemlock moth eat?

Its caterpillars eat poison hemlock, a very poisonous plant.

?How big is the poison hemlock moth?

Its wingspan is about 17 to 19 millimetres, and the caterpillar grows to about 10 millimetres.

For bug experts

Scientific name
Agonopterix alstroemeriana
Named by
Clerck, 1759
Group
Moths
Family
Depressariidae
Classification
Insecta > Lepidoptera > Depressariidae
Lives on
Europe, North America, Australia and Oceania
Also known as
Hemlock moth, Defoliating hemlock moth

Where the facts come from

  1. Agonopterix alstroemeriana (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 dhobern. 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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