Bug Wiki
Sticker of Asian cockroach
Bug card No. 0058 of 1,500

Asian cockroach

Blattella asahinai

The Asian cockroach is a small light brown cockroach with two dark stripes behind its head. It looks almost exactly like the German cockroach. But unlike its cousin, it likes to live outdoors and it is a really good flyer.

Lives in
First found in Japan, now also in the southern United States
Length
1.3 to 1.6 cm (0.51 to 0.63 in)
Top speed
about 2.2 km/h (1.4 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting, and scientists have not found that it carries diseases.
What does it eat?
Like other cockroaches it eats almost anything it finds. It likes to live in old leaves, mulch and compost, where there are lots of rotting plant bits.
For real!Photo of Asian cockroach
Picture by unknown author. Public domain, via Wikimedia Commons.

How big is it?

How long is it?

Asian cockroach about 1.6 cm long (0.63 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 2.5 grains of rice in a rowcould run across a dinner table in 1.6 secondsmoves 38 times its own body length every second

How big is Asian cockroach compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Scientists only found out it was its own kind in 1981, after studying cockroaches from the Japanese island of Okinawa.

2

It is attracted to light, so in the evening it may fly toward bright windows.

3

Where it likes to live, there can be up to 250,000 of them on a piece of land the size of a football field.

4

When the weather turns cool in autumn, their number drops quickly.

5

It probably came to Florida with goods shipped from Japan.

you asked

Most asked questions about Asian cockroach

?How can I tell an Asian cockroach from a German cockroach?

They look almost the same. The Asian cockroach flies well, likes light and lives mostly outdoors.

?Is the Asian cockroach dangerous?

No. It does not bite and it is not known to spread diseases.

?How big is an Asian cockroach?

About 1.3 to 1.6 centimetres long.

For bug experts

Scientific name
Blattella asahinai
Named by
Mizukubo, 1981
Group
Cockroaches and termites
Family
Ectobiidae
Classification
Insecta > Blattodea > Ectobiidae
Lives on
Asia, North America

Where the facts come from

  1. Blattella asahinai (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 unknown author. 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: Cockroaches and termites

Also at home here: Gardens and meadows