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Sticker of Cotton harlequin bug
Bug card No. 0366 of 1,500

Cotton harlequin bug

Tectocoris diophthalmus
Eats: PlantsTrue bugs and cicadasGardens and meadows6 legs

The cotton harlequin bug is a round, shiny bug shaped like a shield. It shines like metal in bright orange, red and blue. Its babies look different again, in shiny green and purple.

Lives in
Eastern Australia, New Guinea and some Pacific islands, in gardens, farms and near the coast
Length
2 cm (0.79 in)
Top speed
about 0.26 km/h (0.16 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It is a plant sucker, so just look at its pretty colours.
What does it eat?
It pokes its mouth into young plant stems and sucks the sap, mostly from hibiscus and cotton plants.
For real!Photo of Cotton harlequin bug
Picture by Louise .. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Cotton harlequin bug about 2 cm long (0.79 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 3 grains of rice in a rowcould run across a dinner table in 14 seconds

How big is Cotton harlequin bug compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Females are mostly orange, while males are blue with red or orange.

2

Every bug looks a bit different. Its many colours may help it fool birds that want to eat it.

3

Its colours are so different that scientists gave it at least 16 different names, thinking they were different bugs.

4

The mother lays her eggs in a ring around a plant stem and stays to guard them until they hatch.

5

It also visits the flowers of flame trees and bottlebrush plants.

you asked

Most asked questions about Cotton harlequin bug

?Is the cotton harlequin bug dangerous?

No. It does not hurt people. It only sucks sap from plants.

?What does the cotton harlequin bug eat?

Plant sap, mostly from hibiscus and cotton.

?How big is a cotton harlequin bug?

It grows to about 2 centimetres long.

For bug experts

Scientific name
Tectocoris diophthalmus
Group
True bugs and cicadas
Family
Scutelleridae
Classification
Insecta > Hemiptera > Scutelleridae
Lives on
Australia and Oceania
Also known as
Hibiscus harlequin bug

Where the facts come from

  1. Tectocoris (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 Louise .. CC BY 2.0, 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: True bugs and cicadas

Also at home here: Gardens and meadows