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Sticker of Emerald cockroach wasp
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Emerald cockroach wasp

Ampulex compressa

The emerald cockroach wasp is a small wasp that shines metallic blue-green like a jewel, with red legs. It is famous for a very strange trick: it can lead a big cockroach around by its feeler, like a dog on a leash. It does this to feed its babies.

Lives in
Warm parts of Africa, South and Southeast Asia and the Pacific islands. It was also brought to Hawaii and Brazil
Length
2.2 cm (0.87 in)
the female; males are smaller
Top speed
about 26 km/h (16 mph)
Flying, estimate
Can it hurt you?
Can bite or sting
What does it eat?
The grown-up wasp sips a little juice from a cockroach. Its baby grows up living on and inside a cockroach.
For real!Photo of Emerald cockroach wasp
Picture by Sharadpunita. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Emerald cockroach wasp about 2.2 cm long (0.87 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 fly across a whole football pitch in 15 secondsmoves 330 times its own body length every second

How big is Emerald cockroach wasp compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

The wasp is too small to carry the cockroach, so it pulls it along by one feeler.

2

It lays its egg on the cockroach inside the burrow and then closes the door with bits of stuff.

3

People brought it to Hawaii in 1941 to fight cockroaches, but it did not help much.

4

One mating is enough for a female to look after babies on several dozen cockroaches.

you asked

Most asked questions about Emerald cockroach wasp

?Why is it called a jewel wasp?

Because its body shines metallic blue-green like a jewel.

?How big is the emerald cockroach wasp?

The female is about 2.2 centimetres long. The male is smaller.

For bug experts

Scientific name
Ampulex compressa
Group
Wasps and hornets
Family
Ampulicidae
Classification
Insecta > Hymenoptera > Ampulicidae
Lives on
Africa, Asia, Australia and Oceania, South America
Also known as
Jewel wasp

Where the facts come from

  1. Emerald cockroach wasp (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 Sharadpunita. 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.

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