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Sticker of Large milkweed bug
Bug card No. 0829 of 1,500

Large milkweed bug

Oncopeltus fasciatus
Eats: PlantsTrue bugs and cicadasGardens and meadows6 legs

The large milkweed bug is a bright orange and black bug with a big X-shaped pattern on its back. It lives on milkweed plants in North and Central America. Its loud colours tell birds that it tastes terrible.

Lives in
North and Central America and the Caribbean, on roadsides, fields and meadows
Length
1.1 to 1.2 cm (0.43 to 0.47 in)
Top speed
about 0.2 km/h (0.12 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It only tastes bad to animals that try to eat it.
What does it eat?
It feeds on milkweed plants, poking them with its straw-like mouth.
For real!Photo of Large milkweed bug
Picture by Rhododendrites. CC BY-SA 4.0, via Wikimedia Commons.

How big is it?

How long is it?

Large milkweed bug about 1.2 cm long (0.47 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
as long as 2 grains of rice in a rowcould run across a dinner table in 18 seconds

How big is Large milkweed bug compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Its eggs are bright orange and easy to spot.

2

Babies are mostly red with black feelers. They get more black spots and little wing pads as they grow.

3

It does not change inside a cocoon. It grows in four baby stages, which takes about a month.

4

Milkweed bugs from the north fly far away for the winter, while those in warm places stay at home.

5

Underneath, a male has one black band and a female has two black spots.

you asked

Most asked questions about Large milkweed bug

?Are milkweed bugs harmful?

No, they do not hurt people. They just live and feed on milkweed plants.

?Why is the milkweed bug orange and black?

The bright colours warn birds and other animals that it tastes nasty.

?How big is a large milkweed bug?

About 1.1 to 1.2 centimetres long.

For bug experts

Scientific name
Oncopeltus fasciatus
Group
True bugs and cicadas
Family
Lygaeidae
Classification
Insecta > Hemiptera > Lygaeidae
Lives on
North America

Where the facts come from

  1. Large milkweed bug (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 Rhododendrites. CC BY-SA 4.0, 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 hello@bugwiki.app and we will fix it.

More from the same group: True bugs and cicadas

Also at home here: Gardens and meadows