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Running Crab Spiders

There are 2 species of spiders that are known as crab spider - the"true" crab spider or flower spiders that are in the Thomisidae family and the "huntsman spiders" which are known as giant crab spiders. Spiders in the family Philodromidae are commonly known as "running crab spiders", after their speed and the fact they run sideways, like their seafood counterparts. This family is superficially similar to the "true" crab spiders in the family Thomisidae. One distinguishing characteristic of the running crab spiders is their legs: unlike crab spiders in the family Thomisidae, the Philodromids' second set of legs are the longest and in the genus Ebo this is quite extreme, with the second pair of legs in some species twice as long as the first pair..

These spiders are often found indoors, living in the corners of ceilings and walls. However, these spiders do not build webs - the cobwebs in the picture below are the product of another spider, the cobweb spider Steatoda. Running crab spiders hunt prey as do jumping spiders and do not rely on webs to capture food. The most common genus is Philodromus which, like Ebo is widespread. Other common genera include the elongate grass-dwelling Tibellus and the widespread Thanatus, which includes the widely distributed Holarctic house crab spider Thanatus vulgaris. This species commonly captures flies on and in buildings. The family contains over 500 species in nearly 30 genera. Most are dull colored- brown, gray, yellowish or mottled, and seldom reach above 10 mm in body length. Most have a leaf-like cardiac mark on the anterior dorsal abdomen. None of the species build webs, but they do use silk for draglines and for egg sacs.

Information: Wikipedia

Unidentified Spiders 2017 Unidentified Spiders 2016 Unidentified Spiders 2015
Unidentified Spiders 2014 Unidentified Spiders 2013 Unidentified Spiders 2012
Unidentified Spiders 2011 Unidentified Spiders 2010 Unidentified Spiders 2009 (1)
Unidentified Spiders 2009 (2) Unidentified Spiders 2008 (1) Unidentified Spiders 2008 (2)
Unidentified Spiders 2007 (1) Unidentified Spiders 2007 (2) Unidentified Spiders 2007 (3)
Unidentified Spiders 2006 (1) Unidentified Spiders 2006 (2) Unidentified Spiders 2006 (3)
Unidentified Spiders 2005 (1) Unidentified Spiders 2005 (2) Unidentified Spiders 2005 (3)
Unidentified Spiders 2004 (1) Unidentified Spiders 2004 (2) Unidentified Spiders 2003
Unidentified Spiders 2002 Unidentified Spiders 2001  
Spiders in Amber Closeups Ant & Wasp Mimicking Spiders
Argiopes/St. Andrew's Cross Barn Funnel Weaving Spider Basilica  Spiders
Bird Dropping Spiders Black & Brown House Spiders Bolas Spiders
Brown Recluse Spiders Candy Stripe Spiders Common House Spider
Crab Spiders Cyclosa Conica Daddy Long Legs
Daring Jumping Spiders Dew Drop Spiders Fishing Spiders
Funnel Web (Aus) Furrow Spider Garden Orb Weavers
Ghost Spider Giant House Spider Golden Orb Weavers
Grass spiders/Funnel Weavers Ground Spiders Hacklemesh Weavers
Hobo Spiders Huntsman Spiders Jewelled Spiders
Jumping Spiders Lace Web  Spiders Ladybird Spiders
Leaf Curling Spiders Long Jawed Orb Weavers Lynx Spiders
Marbled Orb Weavers Micarathena Mouse Spiders
Mygalomorphs Net casting Spider Neoscona Semarak
Nursery Web Spiders Parson Spiders Pirate Spiders
Pseudoscorpion Purseweb Spider Red & Black Spiders
Redback Spiders Red Spotted Ant Mimic Spiders Running Crab Spiders
Scorpion Spiders Segestria Florentina Solfugids/Camel Spiders
Southern House Spiders Spider Tats Spitting Spiders
Steatoda Tailless Whip Scorpions Tarantulas
Tengellid Spiders Titiotus (Recluse look alike) Two Spined Spiders
Trapdoor Spiders Tree Trunk Spider Venusta Orchard Spiders
Wandering Spiders White Tailed Spider Widow Spiders
Wolf Spiders Woodlouse Hunters Yellow & Broad faced Sac Spiders
Zoropsis spinimana

Zygiella x-notata

 

METALLIC CRAB SPIDERS

25 June, 2012:
Hi I wonder if you could help me by identifying the spider in the attached picture. I am sorry it was taken with a camera phone – the only one I had on me – and it wasn’t taken from directly above, but I didn’t read your request for this until I got home and wanted to know what it was. It was quite small, less than an inch from front leg tip to back leg tip, but very pretty, sort of turquoise mother-of-pearl. It was a reasonably warm day, maybe 12C - mid-afternoon, in Wigan in the UK – but you can see the exact details and location from the pictures meta-data. It was crawling around on top of and underneath the wooden garden table top. I hope the picture is clear enough and that you can help, I found you with a bit of Googling and seemed the most friendly looking site. Kind regards Mark

ID from Laura:  Running Crab Spider, more specifically it looks like it could be a Metallic Crab Spider or something similar http://bugguide.net/node/view/121110

RUNNING CRAB SPIDERS

6 April, 2017:
Hi, wondering if you can ID the spider attached........I live in South Florida (near Miami) and was recently bitten (didnt feel it) by what I assume was a spider based on symptoms and wound configuration. I assumed it "may" have been a brown recluse but not sure......I was down for almost a week with aches, shivers, high temp, migranes, etc so Im a bit gun shy now dealing with any spiders I see. I have a few antique cars in my garden that I work on occasionally and this is where I spotted this guy.......actually saw one similar on the other car parked beside this one. What is it?

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26 May, 2016:
Found this on my kids sand pit kid. Please would you be able to identify it as all my researching is not bringing anything up Many thanks

 

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25 Oct, 2015:
Hi I wonder if you could have a look at the spider in the attached picture please? It was on a curtain in my living room in Cornwall, England. My gut was telling me it was a species of false widow, but I couldn't find a clear enough picture online to make a sure identification. What do you think? Thanks Martin

 

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23 April, 2015:
This is in Fort Benton, MT

 

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Reply: I think this one is a running crab spider -  glen

20 April, 2015:
Hello! I live in the very corner of northeast Ohio. I found this guy chilling on my wall today. With his leg span, he looked pretty big compared to what I'm used to seeing. Maybe a little bigger than a 50 cent piece. Should I be worried? I'm kind of freaking out. :/

 

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Reply: I think this one is a running crab spider -  glen

6 Feb, 2015:
Hi, Could you tell me what kind of spider this is? It would be greatly appreciated. Thank you, Jim

 

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Reply: I think this one is a running crab spider -  glen

6 July, 2014:
Hoping you could help identify this guy. I live in northern Arizona US. Thanks.

 

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Reply: It's not a recluse but I'm not certain what it is, it looks a bit like a running crab spider so I'll include it on this page -  glen

6 July, 2014:
Hi! Are you accepting photos for your website ? We found this one in a bedroom closet in Lexington KY, and were originally worried it might be a recluse. It doesn't exactly look like one up close but we wanted some opinions on identification . :) Thanks! Nicole

 

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Reply: Definitely not a recluse. This looks like a male running crab spider and harmless - glen

13 June, 2014:
Please let me know if you can tell what kind of spider this is. I found it at my mother's house in Pennsylvania. Thank you so much.

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13 June, 2014:
silly thing was on the inside of the car's window glass use as you lie Ellen

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13 June, 2014:
Can you please ID this spider? Located in South Florida near Fort Lauderdale. Thanks, Bob

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13 June, 2014:
Found this spider in my home today (Chicago suburb) was wondering if you can help me ID it. I was bit pretty bad a few weeks back & had to go to the hospital. I have no problem making a donation. Thanks, Ed

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13 June, 2014:
After my partner returning from Lagos and finding this in her suitcase when unpacking. Should she be worried there could of been more? Thanks Clive

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13 June, 2014:
Hi there . I found this little guy outside of the office at my work . I live in indiana and I have done some research and can't quit pinpoint what species . He kind of looks like the fishing spider but his shape is odd and the color is different . If you could please let me know I would appreciate it . Thanks .Ashley

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Reply: Definitely not a recluse. This looks like a running crab spider and harmless - glen

13 June, 2014:
I found this spider on my room wall. Not sure what type of spider it was. My friend said brown recluse but I know better. Can you help?

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19 August, 2012:
Good afternoon Glen, My name is Blake Broding. You have a very cool website here, very easy to maneuver and with that, I think I found what spider this is? I believe it’s a wolf spider but I always imagined them bigger unless this one is a juvenile? Any help would be appreciated. The picture was taken near a house on a deck railing in a wooded area on the east side of the house about 8:00 pm in the shade in east central, MN I hope this information helps? Thanking you in advance. Blake

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6 July, 2012:
What kind of spider is this?

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6 July, 2012:
Halifax nova Scotia Canada. Thoughts?

 

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4 August, 2011:
hi, was camera happy this weekend as i got a new camera.... well i wanted to test out the close ups and got some more spider photos.... some have IDs, a few i would like an ID for. went on a camping trip, so lots of spiders for me to photograph! Still in the Windsor Ontario region   eleventh im not sure, I'd like an ID. he was sitting on our tent while we were setting it up. Fast little guy when he ran. thanks again :). as always, feel free to use any you would like! Casey

Click for a larger view

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13 March, 2011:
Here are a few pictures of some spiders that I took. One is a Marbled Orb Weaver Spider that I took on November 11, 2010. She was coming down out of the tree on a single thread blowing in the wind and almost blew into my mom, my sister and her Fiance who was holding their 15 month old daughter, as they were walking by on the sidewalk. My sister came running back in to get me, of course I grabbed my camera. This other spider is unknown to me. I have seen several in the house and would like to know what kind they are. I live in Northern Illinois. Thank You. Amy T.

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Reply: On June 10th of 2010 you posted about not being able to identify this spider http://www.spiderzrule.com/510/DSCF2956.JPG Which as far as I can tell is the same as one I was able to photograph here: http://www.facebook.com/photo.php?fbid=10150866376062381&set=a.10150866375602381.430782.561322380&type=3&theater As far as I've been able to figure out, it's a male running crab spider. I hope this helps. -Amy

10 June, 2010:
Hi Glen. I stumbled across your site the other day trying to identify a spider that I keep seeing around my apartment in the Seattle, WA area. I find them all over the walls inside usually around spring or summertime. They are about the size of a dime and have a black body and yellowish legs with no apparent markings. I've had no luck identifying it after browsing, but I've narrowed the choices down to Hobo, juvenile Giant House Spider, or Grass Spider? If you could help me it would be greatly appreciated! Thanks! Sean



 
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Reply: This could be a running crab spider.

21 May, 2010:
hey there found this spider by the garden- door this morning. it's about the size of a black widow (we have many of those, too:)). i live in california. can you tell if it is a dangerous spider, or what it could be? thank you so much, fai

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Reply: No 5 could be a running crab spider.

3 May, 2010:
Hi! I have a few more spiders I've taken pics of that I was wondering if you can identify. I'm sure you're a busy person, so don't feel obligated to get to them quickly---just whenever you can. Thanks so much! 1: I have no idea 2: This one was super small---kind of orange-y red and had indents on its abdomen, which I found interesting. It's on the lip of a jar, so you can see how small it is. 3. This one had the long leg hairs of a lynx, but wasn't sure?? 4. I thought this one was a lynx....the light coloring and leg hairs 5. A crab? This one's missing a leg, but I wasn't sure if it was a crab because the front legs are usually longer, right? And this one's 2nd leg seems longer, so I don't know. Anyway, thanks again. :) Danna

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Reply: It looks like a running crab spider - glen

24 April, 2010:
Hey Glen, Can you help me to ID this spider? actually 2 of them.  I did not kill either of them just threw them out far away from my place into the bushes so I am hoping no more encounters with them and that no one else gets hurt by them if they are dangerous by any chance.  I definitely need an expert like you! Thanks a bunch, Se Spidy Anonymous #1:
 

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Reply: It looks like a running crab spider - glen

24 April, 2010:
Found this while we were moving in. Never saw one of them before. At first glance I thought it might be a recluse in the dim light, as we are apparently on the very edge of loxosceles reclusa range. It was in the garage and had climbed the edge of a mattress leaning against some boxes and found a spot just underneath the end of a plank of facia board set on top of the mattress. He was kind of hidden but somewhat out in the open. I put him in a jar to study more closely but I'm still not sure what he was. Not very skittish either seeing that he didn't move much in the jar at all, or even while I was attempting to prod him around with a pen. In the end as lethargic/still as he was, I carried him through the whole house on a piece of paper with the dime sitting next to him on the sheet of paper the whole time, to photograph him in the daylight. He took off pretty quick after he had been set down on the ground a short while though. What is he? Huntsman/Wandering type species of some sort? Mike Mineral Bluff, GA U.S.



 

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Reply: It is a running crab spider - glen

5 April, 2010:
Can you please tell me what kind of spider this is and if it's dangerous? I've seen smaller (1/4 to 1/2 inch) ones lately but today, this bigger one in my house (1 1/2 inches wide). The are very "flush or flat" to the wall and are always on the ceiling, can take days for them to move from one spot to the next. Thanks
 

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5 April, 2010:
I found this spider on my bathroom wall at 3:30 in the morning. I believe it's a running crab spider (aka flat spider). This spider is from southern New Jersey. All pictures taken by me and free for anyone to use. - Laura Lee
PS The spider looks black to the naked eye - I don't think we had great light on it -- we had to photograph it at night.

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23 August, 2009:
Hello. Perhaps you might be interested in a few of my photos to add to your collection. They are, perhaps, nothing spectacular, but they are a bit different. I'll try to describe them in the order of attachment -  Live spiders, all from Ann Arbor, MI, USA - a crab spider.
Yours sincerely, David
Click for a larger view.

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