4 Male black widow spider identification factors

  1. Male black widow spiders are smaller measuring  about .75 inches in length. including the legs. Female black  widow  are larger with a length of about  1.5 inches in length including the legs.
  2. Male black widow spiders are lighter in color  than the females
  3.  Male black widows have a red or pale brown stripe down the middle of their backs from which white or yellow streaks radiate.
  4. Female black widow spider has an red hourglass shape on its underbelly.