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Sticker of Wheel bug
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Wheel bug

Arilus cristatus

The wheel bug is a big grey bug with a curved crest on its back that looks like half of a cog wheel. It is one of the largest bugs in North America. It moves slowly but is a fierce hunter of other insects.

Lives in
Eastern Canada and the United States, south to Mexico and Guatemala, on plants, trees and in gardens
Length
3.8 cm (1.5 in)
Top speed
about 0.36 km/h (0.22 mph)
On foot, estimate
Can it hurt you?
Can bite or sting
What does it eat?
It grabs caterpillars and beetles with its front legs and stabs them with its sharp beak. Then it turns their insides into juice and drinks it.
For real!Photo of Wheel bug
Picture by Ryan Kaldari. Public domain, via Wikimedia Commons.

How big is it?

How long is it?

Wheel bug about 3.8 cm long (1.5 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)
as long as 6 grains of rice in a rowcould run across a dinner table in 10 seconds

How big is Wheel bug compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

Its babies are bright red or orange and do not have the wheel yet. The wheel only grows after the last skin change.

2

It can make a squeaky sound by rubbing the tip of its beak in a groove under its body.

3

When it flies, it buzzes loudly.

4

A mother lays 40 to 200 little brown eggs and glues them together in a bunch on a twig.

5

Gardeners are happy to see it, because it eats lots of plant pests, like Japanese beetles.

you asked

Most asked questions about Wheel bug

?What does a wheel bug eat?

It hunts other insects, mostly caterpillars and beetles.

?How big is a wheel bug?

It can be up to 38 millimetres long. Females are a bit bigger than males.

For bug experts

Scientific name
Arilus cristatus
Group
True bugs and cicadas
Family
Reduviidae
Classification
Insecta > Hemiptera > Reduviidae
Lives on
North America
Also known as
North American wheel bug

Where the facts come from

  1. Arilus cristatus (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 Ryan Kaldari. Public domain, 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: True bugs and cicadas

Also at home here: Gardens and meadows