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Sticker of Black-headed cardinal beetle
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Black-headed cardinal beetle

Pyrochroa coccinea

The black-headed cardinal beetle is bright red with a shiny black head. It has long, feathery feelers that look like tiny combs. You can spot it on sunny spring days near old logs in the woods.

Lives in
Europe and western Asia, in woods and pastures
Length
1.4 to 2 cm (0.55 to 0.79 in)
Top speed
about 0.58 km/h (0.36 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. Its bright red colour tells birds and other hunters that it is bad to eat.
What does it eat?
The grown-up beetle hunts small insects and also nibbles flowers and pollen. The larva lives under bark and eats rotting wood and tiny living things there.
For real!Photo of Black-headed cardinal beetle
Picture by soebe. CC BY-SA 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Black-headed cardinal beetle 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 6.2 seconds

How big is Black-headed cardinal beetle compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

Its larva lives for many years under the bark of fallen trees before it becomes a beetle.

2

The larva is flat and creamy yellow, so it can squeeze into narrow cracks in the wood.

3

The grown-up beetles live only a short time. Most of them are seen in May and June.

4

Boys have comb-like feelers, while girls have feelers with little saw teeth.

5

It has a cousin with a red head, so look at the head to tell them apart.

you asked

Most asked questions about Black-headed cardinal beetle

?Is the cardinal beetle dangerous?

No. It is harmless to people, but its red colour warns birds not to eat it.

?What does the cardinal beetle eat?

Grown-ups eat small insects, flowers and pollen. The larvae eat rotting wood under bark.

?How big is the black-headed cardinal beetle?

It is about 14 to 20 millimetres long, about as long as a paperclip.

For bug experts

Scientific name
Pyrochroa coccinea
Group
Beetles
Family
Pyrochroidae
Classification
Insecta > Coleoptera > Pyrochroidae
Lives on
Europe, Asia

Where the facts come from

  1. Cardinal 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 soebe. 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