Walnut orb-weaver
The walnut orb-weaver is a flat, dark spider with a leaf-like pattern on its back. It is so flat that it can squeeze into tiny cracks in walls and under bark. In the evening it comes out and builds a big round web.
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Fun facts
Its web can be up to 70 centimetres across, wider than a car tyre.
A signal thread runs from the web to its hiding place, so it can feel when something gets caught.
The little dents on its back are where muscles attach that pull its belly flat.
Females can be found all year, but the males mostly show up in summer.
Its body is reddish brown to black, with greenish leaf-shaped marks.
Most asked questions about Walnut orb-weaver
?Where does the walnut orb-weaver live?
Around houses, in wall cracks, under loose bark and on fences.
?How big is a walnut orb-weaver?
Females are up to 15 millimetres long, males up to 8.
For bug experts
- Scientific name
- Nuctenea umbratica
- Named by
- Clerck, 1757
- Group
- Spiders
- Family
- Araneidae
- Classification
- Arachnida > Araneae > Araneidae
- Lives on
- Europe, Asia
Where the facts come from
- Nuctenea umbratica (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
- Picture by Magnefl. CC BY-SA 4.0, 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 hello@bugwiki.app and we will fix it.
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