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Sticker of Giant mesquite bug
Bug card No. 0599 of 1,500

Giant mesquite bug

Thasus neocalifornicus
Eats: PlantsTrue bugs and cicadasDeserts and dry places6 legs

The giant mesquite bug is a big brown bug with red and black striped legs. Its babies look totally different: they are white and red and cannot fly. It lives in the desert and spends its life on mesquite trees.

Lives in
The Sonoran Desert in the southwest USA and northwest Mexico, on mesquite trees
Length
5 cm (2 in)
Top speed
about 0.41 km/h (0.25 mph)
On foot, estimate
Can it hurt you?
Harmless
It does not bite or sting people. If you bother it, it may spray a smelly liquid, so just watch it from close by.
What does it eat?
It drinks the sweet sap and sucks on the sugary seed pods of mesquite trees. The babies and the grown-ups eat the same food.
For real!Photo of Giant mesquite bug
Picture by Marshal Hedin. CC BY-SA 2.5, via Wikimedia Commons.

How big is it?

How long is it?

Giant mesquite bug about 5 cm long (2 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 8 grains of rice in a rowas long as 1.5 toy building bricks in a rowcould run across a dinner table in 8.8 seconds

How big is Giant mesquite bug compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

It is the biggest land bug in its whole big group of true bugs.

2

When it is scared, it sprays a stinky chemical. The babies' spray is strong enough to harm a praying mantis.

3

The same smell also works as a message that tells other bugs nearby: danger, spread out.

4

Tiny helpful germs from the soil live in its tummy. Without them, the young bugs cannot survive.

5

Only the eggs live through the winter. The babies hatch and grow all through spring and summer.

you asked

Most asked questions about Giant mesquite bug

?Is the giant mesquite bug dangerous?

No. It does not bite people, but it can spray a smelly liquid if you grab it.

?What does a giant mesquite bug eat?

Sap and sweet seed pods from mesquite trees.

?How big is a giant mesquite bug?

A grown-up is about 5 centimetres long.

For bug experts

Scientific name
Thasus neocalifornicus
Group
True bugs and cicadas
Family
Coreidae
Classification
Insecta > Hemiptera > Coreidae
Lives on
North America

Where the facts come from

  1. Giant mesquite 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 Marshal Hedin. CC BY-SA 2.5, 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: Deserts and dry places