Bug Wiki
Sticker of Mouse spider
Bug card No. 2934 of 4,939

Mouse spider

Scotophaeus blackwalli
Name means: “its hairy grey-brown body looks like a tiny mouse”
Eats: Other bugs and small animalsSpidersHouses and farms8 legsNot an insect, but a bug cousin

The mouse spider is a dark brown and grey spider covered in soft hairs that make it look like a tiny mouse. It does not build a web. At night it creeps around and hunts insects and other spiders.

Fun fact: spiders are not insects. Insects have six legs, spiders have eight. Everyone calls them bugs anyway!
Lives in
Europe, Turkey and Iran, now also North America, Peru and Hawaii, often in houses
Length
0.9 to 1.2 cm (0.35 to 0.47 in)
Top speed
about 1.3 km/h (0.81 mph)
On foot, estimate
What does it eat?
It hunts insects and other spiders at night and also eats dead things it finds.
For real!Photo of Mouse spider
Picture by Mick E. Talbot. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Mouse spider about 1.2 cm long (0.47 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
as long as 2 grains of rice in a rowcould run across a dinner table in 2.8 secondsmoves 30 times its own body length every second

How big is Mouse spider compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

It ties up its prey with sticky silk from its big spinnerets at the back of its body.

2

Females make silk nests to keep their eggs safe.

3

In Britain it is often found in and around houses in autumn.

4

In warmer parts of Europe it hides under tree bark and in holes in walls.

you asked

Most asked questions about Mouse spider

?Why is it called the mouse spider?

Its grey-brown hairy body looks like a tiny mouse.

For bug experts

Scientific name
Scotophaeus blackwalli
Group
Spiders
Family
Gnaphosidae
Classification
Arachnida > Araneae > Gnaphosidae
Lives on
Europe, Asia, North America, South America, Australia and Oceania

Where the facts come from

  1. Scotophaeus blackwalli (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 Mick E. Talbot. CC BY 2.0, 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.

Bug Wiki honey jar For grown-ups: Bug Wiki is free, with no ads and no tracking. A small tip helps keep it online.Leave a tip

More from the same group: Spiders

Also at home here: Houses and farms

Honey jarfor grown-ups