Despite appearances, this is not a black widow or redback spider – and that’s the point really.
This is a Noble False Widow (Steatoda nobilis), an arachnid that derives a survival advantage by looking like the much more venomous species.
It is also an inveterate traveller. In recent decades it has hitched rides on ships and planes and spread from its core homelands, Madeira and the Canary Islands, establishing itself in western Europe and around the Mediterranean rim.
Lately it has also set up beachhead populations in California, South America and Central Europe.
Writing in the journal Neobiota, a team of scientists led by Tobias Bauer from the State Museum of Natural History Karlsruhe in Germany has mapped the invasion pathways of the False Widow in an attempt to understand not only its past movements but also to predict where it might crop up next.
“South Africa, some areas in southern Australia, and a large part of New Zealand turn out to be highly likely targets for future invasions, unless appropriate import control measures are implemented,” the report concludes.
Originally published by Cosmos as The widows are coming
Cosmos
Curated content from the editorial staff at Cosmos Magazine.
Read science facts, not fiction...
There’s never been a more important time to explain the facts, cherish evidence-based knowledge and to showcase the latest scientific, technological and engineering breakthroughs. Cosmos is published by The Royal Institution of Australia, a charity dedicated to connecting people with the world of science. Financial contributions, however big or small, help us provide access to trusted science information at a time when the world needs it most. Please support us by making a donation or purchasing a subscription today.
