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  #21  
Old 10-04-2011, 11:22 AM
Paul Paul is offline
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A different sort of beauty ..... Male
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Often a closer head shot is useful for sexing mature spiders but I'm 100% positive that is a female. They are only found in a few very small ranges in Florida.

Here's a link to a pic of an incredibly colored female. (There is a lot of variation in color pattern in this species.)
http://www.johnkoerner.org/Spiders/redwidow2.jpg
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  #22  
Old 10-04-2011, 11:24 AM
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Quote:
Originally Posted by Paul View Post
Awww, jumping spiders are SO CUTE! (That one appears to be a female btw.)

Well Beverly, I'll just have to settle for being entertained by my tarantulas and my spiders until you can get out and get some pics.

Paul, I'm impressed with your spidey skillz. How do you tell that it is a female?
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  #23  
Old 10-05-2011, 04:25 AM
Triffid Triffid is offline
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Loving Junebugs picture!

Yes, how do you sex spiders?
I was led to believe that most females have larger rounder abdomens for their species. Surprised that you can sex them from the head.

Must learn more!

Last edited by Triffid; 10-05-2011 at 04:28 AM..
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  #24  
Old 10-05-2011, 12:10 PM
Junebug Junebug is offline
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Quote:
Originally Posted by Triffid View Post
Loving Junebugs picture!

Yes, how do you sex spiders?
I was led to believe that most females have larger rounder abdomens for their species. Surprised that you can sex them from the head.

Must learn more!
Thanks. I deducted this was a female because of all the babies. The photo was taken a few years back when I was cleaning my slider doors. The family of spiders had established their home in the metal track above the doors. I thought at the time they were some type of widow, but was never really sure. I commonly see brown widows and on occassion a black one, but this one looked different.
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  #25  
Old 10-06-2011, 01:01 AM
Paul Paul is offline
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Quote:
Originally Posted by Tindomul View Post

Paul, I'm impressed with your spidey skillz. How do you tell that it is a female?
Quote:
Originally Posted by Triffid View Post
Yes, how do you sex spiders?
I was led to believe that most females have larger rounder abdomens for their species. Surprised that you can sex them from the head.
Cesar, I must admit that I am making a couple of assumptions here. Based on the time of year in conjunction with how large and plump as the jumper you showed appears to be, I'm assuming it is a mature adult. If it is a mature adult then I definitely know it is a female. If it is still an immature individual, then I have a 50/50 chance of being correct.

Triffid, while it is generally the case that in a mature male will have a smaller abdomen it is not necessarily written in stone (or in this case silk). Particularly with immature spiders, there often is no visual difference at all between the two sexes. (Although in some species the difference between male and female is so extreme, it is hard to believe they are even the same species.)

But on to the question at hand ... how can one sex a mature spider by looking at the spider's head?
It all comes down to looking at the spider's pedipalps. In arachnids pedipalps are a pair of segmented appendages located at the front of the animals head. In spiders they are small leg-like structures found one on either side of the fangs. Spiders ordinarily use their pedipalps to manipulate food and other objects as well as additional sensory apparatus. In mature male spiders, the pedipalps undergo a transformation during their molt to adulthood causing them to take on an enlarged 'boxing glove' like appearance. (This is easily visible on my male red widow.) These modified pedipalps will be used to deposit the male's sperm into the female's genital opening. Here is a pretty decent, simple explanation for those interested: HowStuffWorks "Spider Reproduction"
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  #26  
Old 10-06-2011, 04:47 AM
Triffid Triffid is offline
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Junebug,
I guess a load of babies is usually a good indicator.

Paul,
Thank you for the explanation!

It's so nice to learn new things.
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  #27  
Old 10-06-2011, 09:08 AM
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I manged to get pics of this one yesterday before it finally ran off.

DSC_0007_edited-1 by tindomul1of9, on Flickr


DSC_0016 by tindomul1of9, on Flickr


DSC_0017 by tindomul1of9, on Flickr


DSC_0010 by tindomul1of9, on Flickr
I'm thinking American House spider.
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"We must not look at goblin men,
We must not buy their fruits:
Who knows upon what soil they fed
Their hungry thirsty roots?"

Goblin Market
by Christina Georgina Rossetti
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  #28  
Old 10-09-2011, 02:38 PM
Vanda lover Vanda lover is offline
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It's amazing how freaked out people can get when they see spiders. I guess it's instinctive. I think they are beautiful. I saw one in the bathroom one morning that matched the blue-green colour of the wall.
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  #29  
Old 10-09-2011, 04:19 PM
Amanda L Amanda L is offline
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I'm fascinated and freaked out by spiders. I will not kill one, on purpose. There are black widows, outside around the doors and under down spouts. I will not kill them, I just leave them alone and let them eat all the bugs that would otherwise come into the house. I don't like it when people get all kill happy with spiders and snakes. If not for those two creatures their homes would be overrun with rodents and bugs! I live by the "leave it alone and it will leave you alone" philosophy.

Cool pictures everyone. But, they still give me the heebie jeebies!
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  #30  
Old 10-09-2011, 06:48 PM
Vanda lover Vanda lover is offline
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I completely agree Amanda! There is no reason to hate these things. Every creature is important in some way. I love them all.

Nancy
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