Is This The Most Dangerous Spider In The U.K?

One of the great things about being a Pest Control Officer is that no two days are ever the same, The endless variety brings fresh challenges and you never know what unusual surprises are waiting just around the corner.

I had such a situation earlier this week when a local pet shop phoned Cavalry Pest Solutions and asked could someone call in.

When I arrived, the owner asked me to wait whilst he went to fetch a container with an unidentified spider in it.
Looking at the specimen, I could understand the Owners concern as this spider looked somewhat similar to some of the more dangerous species such as the Black Widow and the brown recluse, neither of which are naturally native to the u.k
Correct Identification of species is all the more difficult when in the field and it’s important to have this service carried out by a professional company such as Cavalry Pest Solutions.
I identified the Spider as a Species of False Widow,Steatoda grossa.

S.grossa1 

The False Widow Spider, one of a small number of species that are found in britain may have hitched a ride on a delivery, although it has become more frequent in the south-east and is probably spreading north, with records as far north as the Orkneys.

S.grossa2

Most reported Spider Bites are attributed to False Widows,but these claims are difficult to substantiate and may be exaggerated by the media.
Being bitten by a spider is unlikely in this country in normal circumstances, and the effect of a bite is unlikely to be worse than being stung by a wasp or bee. A more serious problem is only likely to arise in the event of an allergic reaction or if the person is already compromised by other health issues.

Nevertheless, if severe swelling or ulceration results from a suspected spider bite it is recommended that you see your doctor immediately or visit an A&E Department.

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5 Comments on “Is This The Most Dangerous Spider In The U.K?”

  1. [...] Is This The Most Dangerous Spider In The U.K? [...]

  2. Sheena says:

    I found 3 of these in my house over the past 9 months and the markings are spot on! Most recent was yesterday in my dining room and a caught it to check it against images online and your top image is exactly the same as the one that i found – is there a way that i can deter these from my house?


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