Currently viewing the category: "Cobweb Spiders"
What's That Bug? does not endorse extermination

Subject:  Male Northern Black Widow?
Geographic location of the bug:  Magnolia, Delaware
Date: 01/02/2019
Time: 04:51 PM EDT
Your letter to the bugman:  Was able to find similar markings on pictures making me think this is a Northern Black widows, but nothing exact. Found in September, near a storage shed under a damp piece of timber.
Thanks.
How you want your letter signed:  Don Sloan

Northern Widow, male or immature female?

Dear Don,
We agree that this is Widow, and considering your location, it is presumably a Northern Widow,
Latrodectus variolus.  We cannot state for certain if it is an immature female or a male, but we would lean towards immature female.  Here is a BugGuide image for comparison.

What's That Bug? does not endorse extermination

Subject:  spider
Geographic location of the bug:  forestville California 95436
Date: 01/01/2019
Time: 01:16 AM EDT
Your letter to the bugman:  Found this in my sons sandbox very pretty just wondering what it is.
How you want your letter signed:  Hannah

Immature Black Widow

Dear Hannah,
This appears to be an immature, female Black Widow which is pictured on BugGuide.  You should use this as an opportunity to teach your son about a species of spider that should be avoided.  According to BugGuide:  “
Caution: Anyone bitten by a western black widow spider should receive prompt and proper medical treatment. While the black widow is considered the most venomous spider in North America, death from a black widow spider bite is highly unlikely.
For the most part, the black widow’s bite may be felt only as a pin prick, during which the spider’s fangs inject a minute amount of highly toxic venom under the skin. The severity of the victim’s reaction depends on his or her age and health, and on the area of the body that is bitten. Local swelling and redness at the site may be followed in one to three hours by intense spasmodic pain, which can travel throughout the affected limbs and body, settling in the abdomen and back (intense abdominal cramping, described as similar to appendicitis), and can last 48 hours or longer. Elderly patients or young children run a higher risk of severe reactions, but it is rare for bites to result in death; only sixty-three having been reported in the United States between 1950 and 1959 (Miller, 1992). Other symptoms can include nausea and profuse perspiration. If left untreated, tremors, convulsions and unconsciousness may result. When death does occur, it is due to suffocation.”

What's That Bug? does not endorse extermination

Subject:  Strange-Looking Spider
Geographic location of the bug:  Tamshiyacu Tahuayo Regional Conservation Area, Loreto, Peru
Date: 06/15/2018
Time: 10:51 PM EDT
Your letter to the bugman:  Hello-
I was in Peru last month and found this unique-looking spider in my canoe. It is definitely a spider, as it used a silk dropline and had its body divided into two distinct parts (it only had 7 legs, but I suspect it originally had 8 and lost one). I am at an utter loss to what species it is. Would you please be able to help identify it? I apologize for the lack of a better-quality picture.
How you want your letter signed:  Captain Nemesis

Whip Spider

Dear Captain Nemesis,
This is quite an unusual looking Spider.  It reminds us of of the Scorpion Tailed Spider from Australia, though we do not believe your individual is in the Orbweaver family.  We are posting your image while we attempt to identify your unusual Spider.  Perhaps Cesar Crash of Insetologia will recognize it.

Update:  Thanks to Karl who submitted a comment identifying this as a Whip Spider in the genus Ariamnes, and providing a link to pBaseArachnidos de Centroamerica also has a matching image.

 

What's That Bug? does not endorse extermination

Subject:  What’s in my web?
Geographic location of the bug:  Camarillo, Ca near succulents
Date: 05/07/2018
Time: 07:53 PM EDT
Your letter to the bugman:  Dear Bugman,
I was outdoors enjoying some fresh air and succulents  and noticed a pretty substantial spider web plus these very interesting white spiky spheres. I’m wondering if you can identify them?
How you want your letter signed:  Melanie on the Irish Chain

Brown Widow Egg Sacs

Dear Melanie on the Irish Chain,
These are the Egg Sacs of a Brown Widow Spider, a species recently introduced to North America from Africa.  The Brown Widow is a relative of the native Western Black Widow, and since the introduction of the Brown Widow, populations of native Western Black Widows seem to have diminished, perhaps being displaced by a more competitive relative.

What's That Bug? does not endorse extermination

Subject:  Is this a black widow?
Geographic location of the bug:  Northern Michigan
Date: 10/21/2017
Time: 02:29 PM EDT
Found this creature inside my home 10/21/2017.  Is this an immature female black widow? It had the red spots on the back and some on the abdomen. We also found this one the the porch in early October. Is it an orb weaver?
How you want your letter signed:  J.E.

Immature, female Northern Black Widow

Dear J.W.,
This is most certainly an immature, female Widow Spider, and considering your location, it is most likely an immature, female Northern Black Widow,
Latrodectus variolus, which is pictured on BugGuide.  Your other spider is indeed an Orbweaver.

What's That Bug? does not endorse extermination

Subject:  Not a black widow, or is it?
Geographic location of the bug:  Apartment in eastern Massachusetts
Date: 10/17/2017
Time: 07:04 PM EDT
I found this odd looking spider in my apartment. My first thought was black widow, given its shape and the pattern on its back, but the coloration is different. What is this spider?
How you want your letter signed:  Joe

Cobweb Spider

Dear Joe,
Though your image is quite blurry, we concur that this does look like a Widow in the genus
Latrodectus, and we believe it might be a highly variable Brown Widow, a species recently introduced from Africa.  According to BugGuide data, it has been reported from nearby Maryland, and in Southern California in recent years it has nearly supplanted the native Black Widow.   While we entertain that possibility, we think this is more likely a harmless member of the Cobweb Spider family, like possibly Steatoda triangulosa which is pictured on BugGuide.

Update:  October 22, 2017
Thank you. We’ve gotten a picture of one of these spiders’ underside and observed their behavior a bit. They’re aggressive if their webs are disturbed, and roll into a ball if they fall. The webs themselves are messy and thee-dimensional, but not really funnel shaped.
Does this affect the identification?
Joe

Cobweb Spider

Hi Joe,
We agree with Cesar Crash who provided a comment that this is NOT a Brown Widow, and most likely a harmless Cobweb Spider.  Your new image confirms that conclusion.

What's That Bug? does not endorse extermination