Picture ID 101413

Picture of unidentified spider

Comments & ID Thoughts

I think this is a black widow. But thought it should have a red marking on the body

  • Submitted by: 
  • Submitted: Mar 30, 2020
  • Photographed: Mar 29, 2020
  • Spider: Unidentified
  • Location: Arvada, Colorado, United States
  • Spotted Outdoors: Under rock, log, or debris
  • Found in web?: No
  • Attributes:
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TangledWebTohruTheDragon Recent comment authors
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Could be a false black widow


True, it could be a Steatoda species spider or a Western Black Widow, Latrodectus hesperus. Both the False Widows and Widows are in the same family, Theridiidae. The Black Widows and Brown Widows have the classic “hourglass” mark on the underside of the spider. It is orange on Brown Widows. Black Widows normally also have marks on the top, but not always. So do most False Widow. The topside (dorsal) marks of a Black Widow look like a line or row of dots down the back. So, if you can’t tell, keep the spider away from your skin. None of… Read more »