Juvenile Western Black Widow

Weird Spider
Location: Sacramento, Ca
January 10, 2011 11:31 pm
We found this spider in a towel in our backyard and weren’t sure what it was. Can you help??
Signature: Alysha

Juvenile Western Black Widow

Dear Alysha,
This is a juvenile Western Black Widow.  This female will eventually lose the intricate markings and mature into a glossy black spider with a red hourglass marking on the underside of the abdomen.  If you flipped this juvenile over, you would see the hourglass.  You may compare your spider to this image on BugGuide.

Photo of author


BugMan aka Daniel Marlos has been identifying bugs since 1999. WhatsThatbug.com is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

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