Picture ID 99157

Picture of unidentified spider

Comments & ID Thoughts

What are these? Are these yellow sac spiders?

  • Submitted by: 
  • Submitted: Feb 4, 2020
  • Photographed: Feb 4, 2020
  • Spider: Unidentified
  • Location: St. Mary’s City, Maryland, United States
  • Spotted Outdoors: Man-made structure (building wall, fences, etc.)
  • Found in web?: No
  • Attributes:
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JoubeetooTangledWeb Recent comment authors
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I think they’re young Nursery Web Spiders, Pisaurina mira. They have the same shape, P. mira are larger and have some form of wide stripe down the back. Sometimes it is thin or just dots. Yellow Sac Spiders have a short greenish stripe that starts at the part of the abdomen closest to the cephalothorax. This species has at least 6 different markings variations of the stripe. These might be young males following the pheromones of a female who is ready to mate. They are able to jump up and forward. It can be surprising, but they aren’t dangerous to… Read more »