What's That Bug? does not endorse extermination

Trying to identify this spider.
February 28, 2010
I’ve got this great picture my brother took. We’re trying to identify it. Can you give me any information. Is it poisonous?
Southern California

Immature Black Widow

Hi Renee,
This is an immature Black Widow, and you probably know that the bite can be dangerous.  The female’s venom may cause a poisonous reaction.  BugGuide has much information on the Widow Spiders in the genus Latrodectus, and there are numerous images that show these markings on the immature specimens.

What's That Bug? does not endorse extermination
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2 Responses to Immature Black Widow Spider

  1. Sharon flood says:

    I hope one of these articles is correct in stating that a black widow spider lives around 180 days as I have also read elsewhere that they can live up to a few years. I have seen an immature one three times inside where I live and been bitten several times so far. The first two times I was very ill. I have searched everywhere for it and constantly vacuum everywhere but every time is sleep with the lights off I am bitten again. Your info on how they live for just 180 days has given me hope that I may outlive this critter after all!

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