Subject: Adult spider in a cocoon
Location: Mesa, AZ
November 6, 2012 4:55 pm
Cocoon measures approx. 1.5 inches across. Found attached to a piece of wood in Mesa, AZ. Spider appears to be alive but dormant. The cocoon was very hard to tear open. I was surprised to see an adult spider inside. I can send bigger pics if need be. Any idea what it is?
This sure looks like a female Giant Crab Spider or Huntsman Spider, Olios peninsulanus, when compared to this image on BugGuide, though she may be another member in the same genus. We are very curious about the circumstances of this sighting. We will contact Eric Eaton to see if he knows anything about Giant Crab Spiders going dormant.
Eric Eaton Responds
I am guessing that this is how they overwinter.
Wow, what a cool spider. My kids are home schooled so we are always on the hunt for something to get them excited. This spider sure got them excited. Thanks for the ID!
“These spiders generally settle into one place only at egg-laying time. Females produce large egg bags that they hide in and guard.”
Hi again Nathan,
Thanks for the additional link. We aren’t certain of the species, but we are confident with the genus Olios identification.