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The 3 Most Venomous Spiders in Southern California

There’s a wide variety of spiders in Southern California.


Three species of spider can be particularly dangerous to humans if they feel threatened. These spiders often find their way into homes and workplaces, where close contact may result in a bite. While they are not aggressive, it is a good idea to seek a spider removal service if you notice one of these species taking up residence in your living space.


Venomous Spiders in Southern California


Black Widow Venomous Spider Souther California - AAction Pest ControlThe three venomous spiders we’re talking about include the black widow, the brown recluse, and the hobo spider.


These species are local here in Southern California, and often make their way into homes and office buildings due to the proximity. These spiders seek out warmer shelter during the colder times of the year, so you will want to make sure your property is sealed and free from open access areas.


Remember: It’s not recommended you try to handle venomous spiders on your own – let the experienced professional in your area handle them.


Let’s take a closer look at each one.


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Let Professionals Handle Venomous Spiders



Black Widows


Female black widows are easily recognized by the distinctive pattern of red coloration located beneath the abdomen.


Black widows prefer dry, dark areas and can often be found in woodpiles, attics, sheds, and garages.


Their bite delivers a powerful neurotoxin that produces pain at the site of the wound while spreading throughout the body via the bloodstream. Black widows sometimes congregate in large numbers, so we recommend you seek out professional help if you suspect you have a problem.


Brown Recluse


The brown recluse spider, or violin spider, is brown in color, and often carry a characteristic violin-shaped marking on the head.


Unlike most spiders, a brown recluse possesses six equal-sized eyes. Their venom can cause severe skin lesions in the form of necrosis, which will require medical attention.


Outdoors, the recluse prefers secluded, sheltered areas, and indoors they can be found in dark places like attics and closets.


Hobo Spider


Hobo spiders have a bite that is initially painless.


However, within 24 hours the bite can develop into painful blistering that eventually breaks open, leaving an open, ulcerated wound. Additional symptoms can include weakness, nausea, memory loss, fatigue, and vision impairment, and individuals should seek first aid or medical attention at the first sign of an adverse reaction. The hobo spider is large and brown, with distinct yellow marking across its abdomen.




Like most spiders, these three venomous spiders in Southern California aren’t aggressive. In most cases, bites occur when people accidentally or purposely disturb the spider.


For this reason, we encourage you to give your local spider removal professional a call before taking action.


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