Entomology (Study of Bugs)/Spider identification


I found this spider climbing a curtain in a south facing window in Peralta, New Mexico on August 9, 2015.  I would like to know what the name of the spider.   Thank you.

Hi, Debbie:

Thanks for including the image.  Unfortunately the spider is in a defensive pose, and its legs are hiding its eyes.  The eye arrangement is important in trying to make identifications of spiders....but, in absence of a size estimate, I think I still may know what it is.

I believe this is a "crevice weaver" in the family Filistatidae, genus Kukulcania .  I wrote a blog post about them awhile back:


That should answer all of your questions.  They are venomous, but *not* considered to be dangerous to the average, healthy human being or pet.  They normally stay hidden in cracks and crevices from which they spin their sprawling webs.  Look for them venturing out onto the web at night.


Entomology (Study of Bugs)

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Eric R. Eaton


I answer insect and spider identification questions ONLY. Attach images if possible. No "what bit me?", "what do I feed this bug in captivity?", or science fair project questions please. NO TECHNICAL QUESTIONS ABOUT INSECT PHYSIOLOGY.


Principal author, Kaufman Field Guide to Insects of North America. Professional entomologist employed previously at University of Massachusetts, Chase Studio, Inc., and Cincinnati Zoo; contract work for West Virginia Department of Natural Resources, Smithsonian Institution, and Portland (Oregon) State University.

Author, Kaufman Field Guide to Insects of North America, Missouri Conservationist magazine, Ranger Rick, Birds & Blooms, Timeline (journal of the Ohio Historical Society). I have contributed to several books as well.

Oregon State University, undergraduate major in entomology, did not receive degree.

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One of the top 50 experts in all categories for AllExperts.com, 2009.

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Principal author of the Kaufman Field Guide to Insects of North America, Smithsonian Institution (contract), Cincinnati Zoo (employer), Portland State University (contract), Chase Studio, Inc (employer), Arkansas Museum of Discovery (guest speaker). Currently seeking speaking engagements, leadership roles at nature festivals, workshops, and ecotours.

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