The noble false widow spider is the largest and most well-known of the three main false widow species found in Britain. According to The Wildlife Trusts, these spiders are not native to the UK — experts believe they first arrived from the Canary Islands in banana shipments during the late 1800s.
When Are Noble False Widows Most Active?
Spider activity peaks in August, especially for males. Dr. Tom Elwood, a leading arachnologist, explains:
“August is when males start moving around in search of a mate. They can crawl in through open windows, climb walls, or even appear in bathtubs.”
This increase in movement makes summer and early autumn the most likely times to spot them indoors.
Are Noble False Widow Bites Dangerous?
While most British spiders are harmless, noble false widows can bite. Their venom is not usually life-threatening, but it can cause:
- A burning or stinging sensation
- Redness and swelling
- Nausea
- In rare cases, allergic reactions or infections
According to the Natural History Museum (NHM), these spiders have a reputation for being dangerous, but their venom is mild compared to true black widows. Most bite symptoms disappear within a few hours, and rarely last more than a day.
Why Noble False Widows Enter Homes
Every autumn, reports surface of false widow spiders becoming uninvited houseguests across the UK. The noble false widow is the species most often spotted indoors. Females grow between 7 and 14 millimetres, making them larger than males.
Dr. Elwood warns that it’s not just open windows that attract them — dust and debris can also be a draw.
“Spiders are attracted to dust, insect remains, and rough surfaces where webs stick more easily. That’s why regular cleaning is just as important as keeping windows shut.”
How to Keep Noble False Widows Out of Your Home
If you want to reduce the chances of finding one inside, experts recommend:
- Keep windows closed day and night during peak spider season.
- Clean glass and frames weekly to remove dust and debris.
- Seal cracks and gaps around doors, vents, and windows.
- Use vinegar-based sprays to discourage web building.
- Declutter corners and dark areas where spiders may hide.
How Common Are They in the UK?
There are over 650 spider species living in Britain, but only about a dozen have ever been recorded biting humans. Noble false widows have been steadily expanding their range since the 1980s, starting in southern England and now moving northward.
Key Takeaway
While noble false widow spiders are more visible in late summer, their bite is rarely dangerous. Simple steps like keeping your home clean, sealing entry points, and closing windows can significantly reduce the chances of them moving in.
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