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Sticker of Harlequin cockroach
Bug card No. 0713 of 1,500

Harlequin cockroach

Neostylopyga rhombifolia

The harlequin cockroach wears a bold black and yellow pattern, like a jester's costume. It cannot fly at all, because its wings are just two tiny flaps. Some people even keep it as a pet because it looks so striking.

Lives in
Probably first from tropical Asia, now in warm countries all over the world, often in houses
Length
2 to 2.7 cm (0.79 to 1.1 in)
Top speed
about 2.8 km/h (1.7 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting, but in houses people see it as a pest.
What does it eat?
Like other cockroaches, it nibbles on leftovers and bits of food it finds around houses.
For real!Photo of Harlequin cockroach
Picture by Carla.antonini. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Harlequin cockroach about 2.7 cm long (1.1 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)
as long as 4 grains of rice in a rowcould run across a dinner table in 1.3 secondsmoves 29 times its own body length every second

How big is Harlequin cockroach compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

When it is scared, it gives off a strong smell that some people say is like almonds, cherries, pears or bananas.

2

Ships and trade carried it to warm places all around the world.

3

Females are usually bigger and chunkier than males.

4

Nobody knows for sure where it first came from, but it was probably tropical Asia.

you asked

Most asked questions about Harlequin cockroach

?Can the harlequin cockroach fly?

No. Both males and females have only tiny wing flaps and cannot fly.

?How big is a harlequin cockroach?

About 20 to 27 millimetres long, about as long as a grape is wide twice over.

?Do harlequin cockroaches smell?

When they feel in danger, they make a fruity or almond-like smell to put off enemies.

For bug experts

Scientific name
Neostylopyga rhombifolia
Group
Cockroaches and termites
Family
Blattidae
Classification
Insecta > Blattodea > Blattidae
Lives on
Asia, Africa, North America, South America, Australia and Oceania
Also known as
Harlequin roach

Where the facts come from

  1. Neostylopyga rhombifolia (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 Carla.antonini. CC BY-SA 3.0, 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 [email protected] and we will fix it.

More from the same group: Cockroaches and termites

Also at home here: Houses and farms