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Sticker of Japanese rhinoceros beetle
Bug card No. 0790 of 1,500

Japanese rhinoceros beetle

Trypoxylus dichotomus
Eats: PlantsBeetlesForests and woods6 legs

The Japanese rhinoceros beetle is a big, shiny dark brown beetle. The male has a long horn on his head shaped like a pitchfork. He uses it to flip other males over, like a tiny wrestler. In Japan it is called kabutomushi.

Lives in
East and Southeast Asia, such as Japan, China, Korea and Taiwan, in leafy forests
Length
3.5 to 8 cm (1.4 to 3.1 in)
males are bigger than females
Top speed
about 0.38 km/h (0.24 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It has no sting and does not bite people, but its legs can grip your finger quite hard.
What does it eat?
The grown-ups drink sweet sap that oozes from tree trunks. The larvae live in the soil and eat rotting leaves and earth.
For real!Photo of Japanese rhinoceros beetle
Picture by Gombe at Japanese Wikipedia. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Japanese rhinoceros beetle about 8 cm long (3.1 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 2.5 toy building bricks in a rowcould run across a dinner table in 9.5 seconds

How big is Japanese rhinoceros beetle compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

The male's horn can be up to one third as long as his whole body.

2

Only the males grow a horn. They use it to push rivals off their feeding tree.

3

Smaller males sneak past the big fighters instead of wrestling them.

4

Even with a huge horn, the male can still fly as fast as the female.

5

Some of these beetles carve into tree bark with their face like a chisel to make the sap run.

you asked

Most asked questions about Japanese rhinoceros beetle

?Is the Japanese rhinoceros beetle dangerous?

No. It does not sting and is harmless to people.

?What does a Japanese rhinoceros beetle eat?

Grown-up beetles drink tree sap. The larvae eat rotting plant stuff in the soil.

?How long does it take to grow up?

About one year from egg to grown-up beetle.

For bug experts

Scientific name
Trypoxylus dichotomus
Group
Beetles
Family
Scarabaeidae
Classification
Insecta > Coleoptera > Scarabaeidae
Lives on
Asia
Also known as
Japanese rhino beetle, Japanese horned beetle, Kabutomushi

Where the facts come from

  1. Japanese rhinoceros beetle (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 Gombe at Japanese Wikipedia. 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: Beetles

Also at home here: Forests and woods