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Sticker of Black webspinner
Bug card No. 0137 of 1,500

Black webspinner

Oligotoma nigra

The black webspinner is a small, dark insect that spins silk, but not from its bottom like a spider. It makes the silk with its front feet. It builds a cosy network of silk tunnels and spends almost its whole life inside them.

Lives in
First from India, now also in the southwest of the United States
Length
9 mm (0.35 in)
Top speed
about 0.4 km/h (0.25 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting and mostly stays hidden in its silk tunnels.
What does it eat?
It nibbles on dead plant bits, old leaves, mosses and lichens. It sneaks out of its tunnels to eat and then hurries back in.
For real!Photo of Black webspinner
Picture by Jesse Rorabaugh. CC0, via Wikimedia Commons.

How big is it?

How long is it?

Black webspinner about 9 mm long (0.35 in)A grain of rice about 6 mm (0.24 in)A toy building brick about 3.2 cm (1.3 in)
small enough to sit on your fingernailas long as 1.5 grains of rice in a rowcould run across a dinner table in 9 seconds

How big is Black webspinner compared to YOU?

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

How fast is it?

cool stuff

Fun facts

1

The silk comes out of tiny glands in its front feet.

2

Only the grown-up boys have wings and can fly. The girls never get wings.

3

The boys like light, so they sometimes fly to lamps at night.

4

It probably travelled to America in the late 1800s, hidden in date palm cuttings on ships.

5

The young ones are pale and slowly get darker as they grow up.

you asked

Most asked questions about Black webspinner

?What is a webspinner?

It is a small insect that spins silk with its front feet and lives in silk tunnels. It is not a spider.

?Where do black webspinners live?

They came from India and now also live in the southwest United States, often near the base of palm trees.

For bug experts

Scientific name
Oligotoma nigra
Group
Other insects
Family
Oligotomidae
Classification
Insecta > Embioptera > Oligotomidae
Lives on
Asia, North America

Where the facts come from

  1. Oligotoma nigra (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 Jesse Rorabaugh. 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: Other insects

Also at home here: Gardens and meadows