|
Black Widow spiders inhabit most of the warmer regions of the world to a latitude of about 45 degrees N. and S. They occur throughout all four deserts of the American Southwest.
Related Species
Widow spiders (Genus Latrodectus) are the best known and largest of the Cobweb Weavers (Family Therididae). All widows are venomous, though not all can cause injury to humans. Black Widows comprise about six species and inhabit most of the warmer regions of the world to a latitude of about 45 degrees N.
The female black widow spider, though it is the most venomous spider in North America, seldom causes death as it injects a very small amount of poison when it bites. Reports indicate human mortality at well less than 1% from black widow spider bites. Anyone bitten by a black widow spider should seek medical care. Black widow spiders are common around wood piles, and are frequently encountered when homeowners carry firewood into the house.
They are also found under eaves, in boxes, outdoor toilets, meter boxes, and other unbothered places.
Black widows have a distinctive round shiny black abdomen with red
markings usually under its abdomen. They are a small spider with
thin legs and the female's abdomen becomes larger just before laying
her egg sac. Males are considerably smaller and usually not as
dangerous as the female due to their size. |
| .. |
|
Reply: Looks like a black widow - glen 23
December, 2011:
I found this spider outside our office in Citrus Heights, CA. Wanting to know what it could be...feel free to use it on your website. |
.jpg) |
| .. |
|
Reply: Yes it is a black widow - glen 23
December, 2011:
Hi! Just wanted to confirm if this is a black widow, and if you knew what kind, etc. I found it hanging out in the outside of my screened patio here in central Florida, USA.
I appreciate any info you can give me. Thanks!
Felipe |
 |
| .. |
|
Reply: This is a black widow too - glen
20 November, 2011:
Kennewick, WA USA Thank you,
SEAN |
 |
| .. |
|
Reply: This is a black widow too - glen
16 October, 2011:
HI,
I was wondering if you could tell me what kind of spider this is?
Thanks,
Stacy |
 |
| .. |
|
Reply: This is a black widow too - glen
28 September, 2011:
This was a spider my friend took a pic of in Western Colorado, USA. |
 |
| .. |
|
Reply: This is a black widow too - glen
28 September, 2011:
Hi Glen
We live in the San Fernando Valley just north of Los Angeles
California. We are accustomed to finding Black Widows but yesterday I
came across a spider that was similar to a black widow but he seemed to
have longer legs and wasn't all black on his back. I've never seen such
a spider here before. Perhaps you can help identify it. |
 |
| .. |
6 September, 2011:
Think it's a widow but not sure |
 |
| .. |
4 September, 2011:
Can u please identify this spider for me? |
 |
| .. |
4 September, 2011:
Hi! I live in Carlsbad, CA and have come across this type of spider over the last few years. This is the only one that has let me take some pictures of it. Could you please give me some information on this type?
Thanks so much,
Bianca |
 |
| .. |
4 September, 2011:
Glen,
I was searching for a Black Widow with similar markings to these when I came across your web site and couldn't find any pics of Black Widows..... So here are a couple for you. Most of the black widows around here are solid black with the classic red hour glass on their belly... this one is unique!!
Sincerely,
Brett |
 |
|
 |
 |
| .. |
|
28 August, 2011:
Hello! My name is Alexander. I live in Savannah, GA. I am fascinated by animals from my childhood. Today I found a Black Widow's nest near the porch of my house. And it wasn't the first spider of this kind I discovered. Few weeks ago I noticed one at my work. She made her nest in one of the corners and hides in the empty tube that hangs over there. So I figured it's the best place the spider could use. What nice spiders they are yet deadly)) This tiny creature killed two lizards already. At first I thought they were grasshoppers but when I came closer I was just shocked to see what those really were. I didn't have time to make pictures of that spider but I got some of the one near my house. I hope you'd like it!
Awesome job with a website, sir! Many thanks! |
 |
|
 |
 |
|
 |
 |
|
 |
 |
|
 |
 |
|
 |
 |
|
 |
 |
| .. |
|
Reply: It could be a male black
widow -
glen
14 August, 2011:
I have found several of these spiders in my apartment and I can't seem to find any photos that resemble this spider, i live in east Tennessee and when I have googles "small black spider with four red dots on back" it gives me the red back spider witch says it's from australia and or black widow both of witch have round grape shaped abdomens so I'm at a loss as to what kind of spider this is and if it's potentially dangerous to my two small children. Any feed back would be greatly appreciated, thank you |
 |
| .. |
|
Reply: This could be a black widow
-
glen
14 August, 2011:
Hi there! My name's Stephanie and I was wondering...can you identify this spider from the back??? I couldn't get close enough to get his face cuz I was worried it might bite me. It is eating a wolf spider (if I'm not mistaken) that got caught in it's web and died. I had seen the wolf spider two days ago and it freaked me out-then today I saw this spider eating it!!!!! I only just noticed after I zoomed in several frames that this spider has some sort of a red mark on its belly, but its not black. Is it a brown widow??? I've never seen one before. I am absolutely terrified of spiders but as long as they're outside I USUALLY let them live...but they better stay outta my space! lol. However, I need to know what to do should I encounter this spider again. It was gone by the time I got home from work.
Thank you so much!
Stephanie
Click for a larger view |
 |
|
 |
 |
| .. |
|
Reply: Thanks, Nice shots!! Click
for a larger view! -
glen
24 July, 2011:
This is my pet black widow, Spidra, enjoying a cicada bug at least 3 times her size. I love you site, great job!
|
|
 |
 |
| .. |
|
Reply: This is a black widow -
glen
12 July, 2011:
What kind of spider is this?
|
 |
| .. |
|
Reply: They look like juvenile black
widows
- they are not brown widows as the egg sacs are not spikey. I
can't really see much red on them so they could also belong the
false widos family but not sure - glen
12 June, 2011:
Hi,
I came across your page when looking up Black Widow's. I am sure you get emails ALL the time. But I was wondering if you could look at the attached email and let me know if I am looking at a regular old spider, or an adolescent black widow. We recently found an adult female in this same spot, so I am wondering if these are her babies.
Thank you so much.
P.S. I attached a few pictures. Because there are about 5 or 6 of these spiders out there. Sorry for the not so great pictures....
--
Rachel>^.^< |
 |
|
 |
 |
| .. |
|
Reply: Black widows come in a variety
of colours but as long as it is black with red in it then I would
class it as a black widow
-
glen
12 June, 2011:
Hi Glen,
Here are a couple of pictures. There is no hour glass on this rascal but could it still be a black widow? Creepy looking thing.
Don |
 |
| .. |
29 May, 2011:
Hi there! Can you help me identify this spider I found this spider in my kitchen? I live in Austin, Texas. I've seen black widows here before, but none that look like that. Any idea what it is?
|
 |
|
 |
 |
| .. |
|
16 May, 2011:
Hi Glen, Took this picture at the shooting range
today. It was under a sandbag that I moved (as I shoot left-handed).
Photo taken with my phone and cropped to show detail. Thought you
may like it for your site. Picture taken in Selma, Alabama. Duncan |
 |
| .. |
|
Reply: Looks like a female black widow
to me
-
glen
29 April, 2011:
Hi, I'm not sure if this is a widow. It is definatly male but I thought the abdomen should be thinner. This is shaped like a female but has huge palps. The other females I have seen here are the classic black w/red hourglass. It was found near Ludington, Michigan, which is the middle of the western edge. |
 |
| .. |
|
Reply: This looks like is a black widow and its bite can be dangerous -
glen
13 December, 2010:
Hi Glen,
I have a friend that lives in Texas and he came accross this picture while demoing old buildings... This spider was hanging out on the door handle!
Can you please tell us what this is?
Thanks,
Sarah |
 |
| .. |
|
Reply: This looks like is a male black widow and its bite can be dangerous -
glen
14 November, 2010:
Hello, my name's Wendy. We live in El Paso, TX, and are about to move into a new home. When doing the inspection, I found this spider in the kitchen. I took photos of it, before we quietly removed it. I was hoping you could help us Identify this spider. It's probably the size of a Pop can lid...
We'd REALLY appreciate it. We searched on many websites and couldn't find a match.
Thanks!
~Wendy and Jason |
 |
| .. |
|
More from Eric: Hi Glen,
Thank you for the quick response!
I never considered this to be in the widow family. There is no red on the underside (I went back out and checked it). (Coincidentally, I also happen to have a brown widow living nearby that I have been watching for a few weeks now as it is the first time I have seen one where I live.) Since your suggestion and the web link that you have provided, I have now narrowed down my identification and searched further.
It is my opinion that my photographs are of a juvenile male black widow.
I found an exact picture of it at: http://nathistoc.bio.uci.edu/spiders/Latrodectus%20hesperus.htm, Entitled, “Second instar (?) male from Orange, Orange County, CA”
I also reviewed the pictures of black widows on your own site at: http://www.spiderzrule..com/blackwidow.htm and see comparable photos of the male widow as an adult.
Anyways, I was completely surprised by this identification. I have seen the male black widow before as an adult, but never knew the markings changed so much from a juvenile as they matured!
Thanks again for your help and take care,
Eric
7 October, 2010:
Dear Glen,
I came across your site, “Spiderz Rule!” at www.spiderzrule.com and have found it of much use!
For my own interest, I have been photographing and cataloging the spiders that live around my house in Chino Hills, California, USA.
I was wondering if you could help me identify one? I have attached two very clear photographs of it.
I believe that this is a common spider, perhaps in the Orbweaver family. I just cannot match up its very distinctive markings to anything else. It also reminds me of a Cellar Spider, but it is smaller in size, with shorter legs and different banding colors on the legs.
Anyways, your consideration and thoughts are greatly appreciated!
Warm regards,
Eric |
|
 |
 |
|
. |
7 October, 2010:
Hey Glenn,
Thank you for reply. I have attached 4 photos of a male and female black widow that I named "Black Widow Courtship I have never seen them together before. Feel free to post to your site.
DaveClick for closeups |
|
 |
 |
|
 |

|
|
. |
|
20 September, 2010:
Greetings Glen, I found your site while researching
spiders found in my back yard. I really enjoyed the site, and am
very impressed by the amount of information available. I have
attached two images for submission to your “Spider Photos”
section.
The 2nd image is a black widow, that had made its home in a plastic trashcan outside my office. ( Nikon D300, 105mm Nikor Micro Lens, 1/60 sec, f/20, ISO 400) – 9/20/2010
Please let me know if you have any questions, and if you like these images I can provide others, I love studying spiders and am always adding more shots.
Rick,
San Antonio, TX, USA
|

Click for closeups |
|
. |
|
Reply from Paul:This is Northern Black Widow 0.o
Here is another shot:
http://wheresthefilm.com/Insects/Arachnids/slides/BlackWidow5509.html.
She is living at Agriculture Canada's Insect collection in Ottawa.
|
|
Reply: I wouldn't be having it on my hand if I
were you!! Their bite can be nasty!! I can't see any red
on it so not sure what sort of black widow. Can you take a better photo not on your hand of the top and bottom and I can tell you for sure?
glen
4 September, 2010:
Here is photo of Black Widow. Other hand was busy taking this photo :) Question: Which Black Widow? ;)
|
 |
| .. |
|
Reply: Be careful this
is a male black widow and its bite can be dangerous -
glen 21 August, 2010:
Hi,
I found this spider in my garage in Utah and was wondering if you could identify it for me. There has been a lot of talk about hobo spiders in my neighborhood and thought that it could be that but it didn't look like other hobo spiders on the net. If you could help me out I would greatly appreciate it.
thanks
|
 |
|
 |
 |
| .. |
14 August, 2010:
I live in Western Colorado and have always found
spiders sort of fascinating. Attached are some pics I have taken of
the creepy crawlies around where I live. The only one I'm sure about
is the Black Widow that I found inside my bbq grill. Unfortunately
since I have a small daughter running around that likes to play
outside near where I found her the widow had to die, but usually
when I find an 8 legged friend I take them a safe distance away and
let them go. The one that is on a blue back ground was a tiny little
thing.. no bigger than a pencil eraser. Feel free to use my pics if
you like. And if you can tell me what any of these are...
particularly the big one in the web... I would appreciate the info.
Thanks a bunch. Donna |
 |
| .. |
2 August, 2010:
Hi. I live in Central Florida and found this Black Widow living in my sons' sand and water table. It was in the hole where the umbrella would go. A couple of days later I found the other spider on the ceiling of my pool screen (on the inside). I was hosing off some ants that are trying to invade our pool via the screen and this one came tumbling down and ended up drowning. Since finding the black widow, I am a little paranoid about what this other spider is. Is it a widow (juvenile black or brown) or is it an orb weaver. Is it dangerous and should I worry that there are others as I have 3 small boys. The web seems very sturdy/sticky similar to the black widow's.
Thanks,
Stephanie |
|
 |
 |
| .. |
1 August, 2010:
This spider was found in a spa house in ridgecrest Ca. Is it a redback?
David
|
 |
| .. |
1 August, 2010:
This spider was on the door frame of our house in East Texas.... outside a town called Quitman. We spend weekends here in east Texas. I have never found out what kind of spider it is. I hope you can help me.
Nanette
Mesquite, Tx USA
ps. You have some great photos of spiders.
|
 |
| .. |
5 July, 2010:
I have used your site several times in the past few years to help me with spider id. For some reason I became semi-arachnophobic during my second pregnancy! Anyway, I thank you for your time and efforts! Your site is a terrific resource! I was going to feed my cat tonight and met up with this spider in my garage. I figured since he/she was posing, I would take a few pics in hopes that you could tell me it’s NOT a black widow… although I am afraid it may be.
Thanks again!
Lauren in North Carolina
|
 |
| .. |
17 June, 2010:
Hello Glen,
Love your site. It has helped in ID'ing some of the spiders I've photographed.
I'm attaching
- An argiope having lunch.
- A black widow
- Maybe a wolf spider. It was really enormous. It was larger than a sparrow. It would have been good to have positioned a ruler or something near the beast, but I wasn't going to get that close to it.
- An unknown spider
Cheers,
George,
New Jersey, USA |
 |
| .. |
21 May, 2010:
hey glen,
looks pretty much like it. i looked thru your archives,
but didn't see that pic underneath at the time i was asking and thought my example was too hairy:)
glad it's not dangerous then.
ever since i nearly took a nice grab on these (see attached pix) while bringing down the trash
i'm a bit more careful...
i'm originally swiss, so i never even thought a spider in house or garden could be venomous, haha.
have a great day and thank you so much for the replay.
|
|
 |
 |
| .. |
19 May, 2010:
Hey, This is a second one I found in my garden. One underneath a brick and this one in a bush of flowers. I’m sure it is a black widow but is it common in Georgia?
Elizabeta
|
 |
|
 |
 |
| .. |
|
Reply: Thanks, nice shot - glen
23 February, 2010:
Here is a really awesome picture of a spider. I am almost sure it is some form of a black widow. Since this is a really awesome picture. You can put it on your page. I love this picture. Thank You JoAnne |
 |
| .. |
|
UNIDENTIFIED LACTRODECTUS |
18 June, 2006:
can u tell me what kind of spider this is thank you
Lucas young
|
 |
|
|
| .. |