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Sticker of Northern bear spider
Bug card No. 3021 of 4,939

Northern bear spider

Arctosa cinerea
Name means: “ashen, like the grey colour of ash”
Eats: Other bugs and small animalsSpidersPonds, rivers and shores8 legsNot an insect, but a bug cousin

The northern bear spider is a big grey-brown wolf spider that lives on sandy beaches. Its colour matches the sand so well that it is hard to spot, even when it walks around in daylight. It does not spin a web to catch food.

Fun fact: spiders are not insects. Insects have six legs, spiders have eight. Everyone calls them bugs anyway!
Lives in
Europe and Asia, and even Congo in Africa, on sandy beaches of rivers, lakes and seas
Length
1.4 to 1.7 cm (0.55 to 0.67 in)
males are smaller than females
Top speed
about 2.4 km/h (1.5 mph)
On foot, estimate
What does it eat?
It hunts small insects and other little animals on the sand.
For real!Photo of Northern bear spider
Picture by Fritz Geller-Grimm. CC BY-SA 2.5, via Wikimedia Commons.

How big is it?

How long is it?

Northern bear spider about 1.7 cm long (0.67 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 1.5 secondsmoves 39 times its own body length every second

How big is Northern bear spider compared to YOU?

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How fast is it?

cool stuff

Fun facts

1

It digs a hole in the sand and covers it with silk. Sometimes it hides under a stone instead.

2

It is one of the easiest wolf spiders to notice in central Europe, because it is so big.

3

It lives only on sandy shores, never far from the water.

4

Wolf spiders like it hunt by running after their food instead of waiting in a web.

you asked

Most asked questions about Northern bear spider

?How big is the northern bear spider?

The female grows to about 17 millimetres long, and the male to about 14 millimetres.

For bug experts

Scientific name
Arctosa cinerea
Group
Spiders
Family
Lycosidae
Classification
Arachnida > Araneae > Lycosidae
Lives on
Europe, Asia, Africa

Where the facts come from

  1. Arctosa cinerea (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 Fritz Geller-Grimm. CC BY-SA 2.5, 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: Spiders

Also at home here: Ponds, rivers and shores

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