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Insect and Spider Identification: SOLVED: Spider ID

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Forum: Insect and Spider IdentificationReplies: 16, Views: 14
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RichSwanner
Citrus Heights, CA
(Zone 9b)

March 10, 2006
7:23 AM

Post #2100837

Black Widow?

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azreno
Mesa, AZ
(Zone 9b)

March 10, 2006
12:45 PM

Post #2101116

Well, that's a real nice photo. Did you get a look at the belly? Is this photo right side up? Females will be belly up and usually have the red hourglass. FWIK, male can have the red hourglass or some colored bands on the abdomen. Looks like your guy (girl) has some colored bands on it's back. A black widow has a solid colored back, doesn't it?

I'm not an expert by any means and have exhausted my extensive knowledge of spiders :-) Hope someone else knows! I hate spiders, but that really is a good photo, nice job!
RichSwanner
Citrus Heights, CA
(Zone 9b)

March 10, 2006
2:24 PM

Post #2101357

This is an immature one. It was upside down. I think this is the same spider a month ago, she is very shy and hard to shoot, a couple of flashes and bye-bye.-Rich

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GroundUp
Port Saint Lucie, FL
(Zone 9b)

March 10, 2006
3:36 PM

Post #2101533

What you have is a southern black widow. Here is a link. The hour glass is a "dead" (no pun intended) give away.


http://woodypest.ifas.ufl.edu/blwidow.htm

trackinsand

trackinsand
mid central, FL
(Zone 9a)

March 10, 2006
4:05 PM

Post #2101634

the bite is extremely painful (not during, but after). i cannot stress enough how sick you become. i had the unfortunate experience several years ago. if it is in an out of the way place, fine, i don't condone killing everything willy-nilly, but if there is a chance you could be bitten, either re-locate it or kill it. i walked with a cane for 2 wks. after the bite, but the 24 hr. period after it, well, i've never been in so much pain or been so sick. debi
kennedyh
Churchill, Victoria
Australia
(Zone 10a)



March 10, 2006
6:59 PM

Post #2102125

I am sorry Rich, but I am not sure that your spider is a Black Widow. I have looked carefully at all the pictures in Bug Guide (4 pages of them) http://bugguide.net/node/view/1999/bgimage
and none of them have the hairy abdomen so clearly shown in your picture. In fact descriptions of the Black Widow usually emphasise that it has a shiny black abdomen.
It is also certainly not the individual you photographed previously as this shows distinct light bands across the legs, that are missing from the new one.
Unfortunately, despite a lot of searching, I have not been able to find a spider that does match your picture,
Ken
RichSwanner
Citrus Heights, CA
(Zone 9b)

March 11, 2006
3:29 AM

Post #2103691

I think you may be right Ken my Black Widow shots all show the shiny abdomen. The only thing is I have never been this close before(I have 3 extension tubes on my macro lens) This is a normal Black Widow.The spider I shot is about 1/3 the size of this full grown and I am 2 or 3 times closer. I will get a stomach shot then I'll know. It is raining tonight so it will have to wait-Rich

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RichSwanner
Citrus Heights, CA
(Zone 9b)

March 11, 2006
3:35 AM

Post #2103703

Ken could this be a adolecent molt(is that the word I am thinking of?)Then later they get the harder shell? Just thinking.
DarwinESF
Syracuse, NY
(Zone 5a)

March 11, 2006
11:14 AM

Post #2103974

Hey, I had the same reaction when I saw the original photo.. looks scary except for the hair.. I lived in Richmond a few years ago and found about 12 black widows (hourglasses and all) in a u-pick pumpkin field there.. Being kindof a freak about strange creatures and having seen them for sale as 'pets' once at a herpetological show, I carefully collected some and kept one for a few years. I had a couple of egg cases hatch and I've seen them go through the color stages, they start out small and mottled and brown and slowly darken with age but I've always noticed the deep glossy hairless abdomen.. And then I went looking and found that there are a bunch of different Latrodectus spiders from around the world, and that it looks to me that the Western black widow does have hair.. two of the photos of L. hesperus from the site kennedyh posted seem to show this.. though the photos aren't quite as clear as yours.. maybe you could post on there for an ID to be sure. http://bugguide.net/node/view/7426/bgimage http://bugguide.net/node/view/39911/bgimage
RichSwanner
Citrus Heights, CA
(Zone 9b)

March 11, 2006
12:53 PM

Post #2104103

I have submitted the photo in www.bugguide.net, will see what happens-Rich
tigerlily123
Raleigh, NC
(Zone 7b)

March 11, 2006
1:02 PM

Post #2104120

One way you might be able to tell is that the web of a black widow is disorganized ( no particular shape to it) and extremely strong, so there is a lot of resistence to your finger when you sweep your finger thru it. Don't worry-they aren't in the web-they are in a dark corner or underneath something-I have never seen them in the web and believe me I have a lot of them in my greenhouses. I have become quite the amateur "expert" on them lol. When we first started seeing them in the greenhouses, we were a bit worried about them, but I called a bug expert at the university to find out about them. He said they are only a problem if you are allergic to bee stings.Then the bite is more of a problem. I was bit once and the bite itched for a few days, but I had nothing of the experience from them as Debi who posted above. It felt like a beesting, and it wasn't even in the greenhouse. Sometimes, for fun, we hunt them down, and we do kill them-I don't need more of them in there or anywhere near the houses. They are very easy to kill-they just sit there-unless you miss and then they move-so you have one good shot at them. Also, their eggs are in a beige/yellowish bag that is usually about a quarter inch wide or so. They are very shiny black-both sexes. Very pretty actually.
RichSwanner
Citrus Heights, CA
(Zone 9b)

March 13, 2006
5:55 PM

Post #2109978

I don't know if I have 2 spiders in the same area, but this one has the red hourglass.

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tigerlily123
Raleigh, NC
(Zone 7b)

March 13, 2006
7:12 PM

Post #2110149

did you look at the webs? Feel them? thats the fastest way to tell. that pic looks like a bl/widow to me.
Joan
Belfield, ND
(Zone 4a)



March 14, 2006
12:08 AM

Post #2110730

Where I used to live there were lots of black widows. Some had the red hourglass and some didn't. It seems I read somewhere that only the females have that? I'll look and see if I can find out for sure.

Okay, I was wrong, they can have the red hourglass. This site is pretty interesting. http://cecalaveras.ucdavis.edu/bwidow.htm

And there's five different species of widow spiders. I didn't know that either. http://www.ext.vt.edu/pubs/entomology/444-422/444-422.html


This message was edited Mar 13, 2006 6:14 PM
RichSwanner
Citrus Heights, CA
(Zone 9b)

March 14, 2006
2:04 AM

Post #2110972

I wonder if that is a Brown Widow? Thanks for the cool info-Rich
Joan
Belfield, ND
(Zone 4a)



March 14, 2006
2:12 AM

Post #2110993

I don't know. It seems that no matter what species they are, they look different at different stages of maturity. That makes it hard to narrow down a positive ID. Have you heard anything from bugguide?
RichSwanner
Citrus Heights, CA
(Zone 9b)

March 14, 2006
3:44 AM

Post #2111212

Not yet.

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