Picture ID 131710

Picture of unidentified spider

Comments & ID Thoughts

Likely a Yellow Sac Spider (Chiracanthium inclusum) can anyone confirm? Found this little one in the sink, It was semi-paralyzed from getting wet. Gave me a chance to take a photo. Once dried out it scampered off.

  • Submitted by: 
  • Submitted: Nov 12, 2020
  • Photographed: Nov 12, 2020
  • Spider: Unidentified
  • Location: Livingston, New York, United States
  • Spotted Indoors: Sink or bathtub
  • Found in web?: No
  • Attributes:
newest most voted
Inline Feedbacks
View all comments

Yes it is a Cheiracanthum sp. Nice presentation, and good job on taking advantage of a spider opportunity! Things to look for to confirm the genus: black feet, they’re velvety in texture, the stripe that sac spiders have dorsally on their abdomens, and the posterior gives the abdomen the look of a lemon. The right side of the screen is the best (and only) ventral photo I’ve seen. Thank you for making this image, it is very useful!


I have been bitten by them, but only outdoors. The ones in the house don’t seem to be able to see people. There are two main species in USA, one is outdoors and occasionally indoors. The other exclusively indoor one is synanthropic. I think I spelled that wrong. The word meaning, “adapted to benefiting from living amongst humans.” When the outdoors ones were in the same space as my forearms when I did yard work for a public park they bit my arms to protect themselves. The human reaction to their venom has not been adequately researched, it is mostly… Read more »


I bookmarked a link to your spider to use as one of my photos for teaching on this site. 🙂


https://spiderid.com/picture/91224/ The cheiracanthum spp. I see outdoors are usually grayish green and larger than the indoors ones.


Here’s an example of bright yellow-green ones.https://spiderid.com/picture/83166/ I use my own photos for presentation too because they were confirmed (second opinioned) by either our site’s moderator or by the experienced volunteers at Bugguide. They’ve kindly helped me get my own photos correctly identified so I can use my observation experience with those spiders to identify others.