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Sticker of Rain beetle
Bug card No. 3475 of 4,939

Rain beetle

Pterostichus melanarius
Eats: A bit of everythingBeetlesGardens and meadows6 legs

The rain beetle is a shiny black ground beetle with fine straight grooves on its back. It runs around on the ground hunting other small creatures. Farmers like it, because it eats slugs and other pests.

Lives in
Europe, and since the 1920s also the United States and Canada, in forests, meadows, fields and towns
Length
1.2 to 1.8 cm (0.47 to 0.71 in)
Top speed
about 1.2 km/h (0.75 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. It is a helper on farms and in gardens.
What does it eat?
It hunts ants, caterpillars, slugs and snails, and it also eats seeds and bits of plants. It especially likes slugs.
For real!Photo of Rain beetle
Picture by Kipling Will. CC BY 3.0, via Wikimedia Commons.

How big is it?

How long is it?

Rain beetle about 1.8 cm long (0.71 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 3 seconds

How big is Rain beetle compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

Some rain beetles have full wings and can fly, while others have short wings and can only walk.

2

It walks about 2.5 to 5 metres a day, and more in summer when it looks for a mate.

3

It finds its food mostly by smell.

4

A female lays about 130 eggs at a time, in shady, wet places.

5

Hungry beetles stay away from places where other rain beetles have already hunted.

you asked

Most asked questions about Rain beetle

?Is the rain beetle harmful?

No. It is harmless to people and eats garden pests like slugs.

?What does the rain beetle eat?

Slugs, snails, ants, caterpillars, and also seeds and plants.

?How big is the rain beetle?

About 12 to 18 millimetres long.

For bug experts

Scientific name
Pterostichus melanarius
Group
Beetles
Family
Carabidae
Classification
Insecta > Coleoptera > Carabidae
Lives on
Europe, North America

Where the facts come from

  1. Pterostichus melanarius (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 Kipling Will. CC BY 3.0, Wikimedia Commons. The sticker of this bug is drawn from this 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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More from the same group: Beetles

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