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Sticker of Headlight beetle
Bug card No. 0718 of 1,500

Headlight beetle

Pyrophorus noctilucus
Eats: A bit of everythingBeetlesRainforests and jungles6 legs

The headlight beetle is a big dark brown click beetle that glows in the dark. It has two shining green spots on its back, like the headlights of a tiny car. It is one of the brightest glowing insects in the world.

Lives in
Islands of the Caribbean, such as Cuba, Jamaica and Puerto Rico, and Brazil
Length
2 to 4 cm (0.79 to 1.6 in)
Top speed
about 0.82 km/h (0.51 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting. It just glows.
What does it eat?
The grown-up beetle eats pollen, rotting fruit and sometimes small insects. Its larvae live in the soil and eat plants and other small creatures.
For real!Photo of Headlight beetle
Picture by Gilberto Santa Rosa from Rio de Janeiro, Brasil. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Headlight beetle about 4 cm long (1.6 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 7 grains of rice in a rowcould run across a dinner table in 4.4 seconds

How big is Headlight beetle compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Its light is so bright that people say you could read a book by it.

2

It also has a third light under its belly that you can see when it flies.

3

Fireflies blink, but the headlight beetle glows steadily. When something touches it, it glows even brighter.

4

Even its eggs, larvae and pupae can glow.

5

It is a click beetle, the kind of beetle that can flip itself into the air with a loud click.

you asked

Most asked questions about Headlight beetle

?Why does the headlight beetle glow?

It has special light organs in its body. When an enemy touches it, it glows brighter.

?Is the headlight beetle dangerous?

No. It is harmless to people.

?How big is the headlight beetle?

About 2 to 4 centimetres long.

For bug experts

Scientific name
Pyrophorus noctilucus
Group
Beetles
Family
Elateridae
Classification
Insecta > Coleoptera > Elateridae
Lives on
North America, South America
Also known as
Headlight elater

Where the facts come from

  1. Pyrophorus noctilucus (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 Gilberto Santa Rosa from Rio de Janeiro, Brasil. 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: Beetles

Also at home here: Rainforests and jungles