False widow questions

The spider is native to Macaronesia, including Madeira and the Canary Islands, and has spread to several other parts of Europe.

For more on how the species became established here and what Irish research has discovered, see The noble false widow spider in Ireland.

Yes. Noble false widows are now firmly established in Ireland, and there is no realistic expectation that the species will disappear from Irish urban environments.

Their ability to live around buildings, reproduce successfully and remain active across much of the year has helped them establish persistent populations.

That does not mean every false widow seen around a home needs to be removed. In many cases, the spider will remain close to its web and avoid contact with people.

False widows usually have a rounded or bulbous abdomen, relatively slender legs and a smooth or slightly glossy appearance. Colour can range from reddish-brown to very dark brown, and pale abdominal markings may be obvious on some spiders and very faint on others.

There are three false widow species commonly encountered in Ireland and Britain, so not every false widow looks like the familiar adult female noble false widow.

For detailed identification, photographs and species comparisons, see our false widow spider guide. If you think you have specifically found Steatoda nobilis, use the noble false widow spider identification guide.

True black widows are not established as commonly occurring spiders in Ireland.

For a fuller comparison of appearance, venom and the relationship between the two groups, see our false widow vs black widow guide.

Confirmed noble false widow bites have ranged from mild local pain, redness and swelling to less common systemic symptoms and, in some documented cases, more significant reactions requiring medical treatment.

Bites are most likely when a spider becomes trapped against the skin, for example inside clothing or bedding, rather than because the spider actively seeks contact with people.

For symptoms, documented cases, bite progression and treatment advice, see our false widow spider bite guide.

For a less severe suspected bite, wash the affected area with soap and water and use a cold compress if it is swollen. Seek medical advice if pain or swelling is severe or worsening, if you develop significant symptoms away from the bite site, or if the area appears infected.

In Ireland, the National Poisons Information Centre Public Poisons Information Line can be contacted on 01 809 216601 809 2166, currently available from 8am to 10pm every day.

For fuller guidance, see our false widow spider bite treatment and symptoms guide.

Do not deliberately burst blisters or repeatedly scratch the area, as damaged skin can become infected.

If symptoms are severe, worsening or causing concern, seek professional medical advice.

Our false widow spider bite guide gives a simple visual treatment reference, warning signs to watch for and current Irish medical-contact information.

Take care when handling stored clothing, gloves, towels or other items that have been left in sheds, garages or near established spider webs. Avoid handling suspected false widows directly with bare hands.

Where spiders repeatedly enter through windows or doors, physical exclusion such as well-fitted insect mesh can help reduce entry without requiring windows to remain closed.

They may establish webs around window and door frames, wall crevices, sheds, garages, fences and other structures where they can remain close to a retreat.

The type of web can also provide a useful identification clue. False widows construct irregular three-dimensional tangle webs rather than circular orb webs.

For examples of false widow webs and other common web types, see our guide to spider webs in Ireland.

If the spider is somewhere where repeated contact is likely — for example beside frequently handled objects or in a sleeping area — it can usually be captured carefully and moved away without handling it directly.

If you are repeatedly finding spiders around entry points, practical prevention is generally more useful than dealing with individual spiders one at a time.

For identification before deciding what to do, see our false widow spider guide.

Differences in body shape, markings and particularly the type of web can help distinguish them.

Compare the most common possibilities in our false widow spider lookalikes guide, or browse spiders in Ireland if none appears to match.