Triangulate Cobweb Spider

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I was taking a quick wander around the garden tonight and I spotted a small rounded spider crawling across a tightrope of silk.

At first I thought it was a European Black Widow but on closer inspection it was an equally cool Triangulate Cobweb Spider.

The scientific name is Steatoda triangulosa. Any spider belonging to the species of Steatoda is known as a False Widow due to the similar size and shape of a Black Widow. This species is not known to have any issues with biting humans but of course as with any spider a rare allergic reaction could occur.

I snapped this quick shot on my smartphone (more information continues below).


These eat other insects and spiders and can even be known to eat the only real problem spider here in Portugal, the Brown Recluse. It also eats ticks! It’s unusual to see one out in the open like this, but suspect I may have disturbed it as I cut back the large Rosemary that grows in the garden earlier today.

The name comes from the triangular patterns on its back. The female can grow to just 6mm in length.

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