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Sticker of Big-headed ground beetle
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Big-headed ground beetle

Scarites subterraneus
Name means: “subterraneus means underground, because it loves to dig and hide”

The big-headed ground beetle is a shiny black beetle with huge jaws at the front. Its front legs are made for digging, so it spends lots of time burrowing in soil and hiding under logs and rocks. At night it comes out to hunt.

Lives in
North America, Central America and the Caribbean, in forests, meadows and backyards
Length
1.5 to 3 cm (0.59 to 1.2 in)
Top speed
about 1.5 km/h (0.93 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless to people. Its jaws are for catching bugs, so just let it go on its way.
What does it eat?
It hunts other small creepy crawlies with its big jaws. It seems happy to eat almost any small bug it can catch.
For real!Photo of Big-headed ground beetle
Picture by Kaldari. CC0, via Wikimedia Commons.

How big is it?

How long is it?

Big-headed ground beetle about 3 cm long (1.2 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 5 grains of rice in a rowcould run across a dinner table in 2.4 seconds

How big is Big-headed ground beetle compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

When it gets scared, it stiffens up, tucks in its legs and plays dead until danger is gone.

2

Each of its big jaws has two teeth.

3

It loves light and is often found under porch lamps at night.

4

Birds such as robins, bluebirds and cardinals like to eat it.

you asked

Most asked questions about Big-headed ground beetle

?Is the big-headed ground beetle dangerous?

No. It is harmless to people. It hunts other bugs, not us.

?What does the big-headed ground beetle eat?

Other small animals like insects and worms. In captivity it eats mealworms.

?Why does the beetle pretend to be dead?

Playing dead helps it trick hungry animals until it is safe to run away.

For bug experts

Scientific name
Scarites subterraneus
Group
Beetles
Family
Carabidae
Classification
Insecta > Coleoptera > Carabidae
Lives on
North America
Also known as
Pedunculate ground beetle, Tunneling large pedunculate ground beetle

Where the facts come from

  1. Scarites subterraneus (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 Kaldari. CC0, 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: Gardens and meadows