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Possible for a Redback spider to be in the US?

Discussion in 'True Spiders & Other Arachnids' started by WiseWarrior, Aug 31, 2013.

  1. darkness975

    darkness975 a Dream Within a Dream Arachnosupporter

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    Good luck with that I am afraid ...

    Speaking of this situation with the L. geometricus , does anyone know if they are continuing to spread and if there are any current papers on the subject or current studies being done?
     
  2. Python

    Python Arachnolord Old Timer

    I'm sure they are spreading. A couple years ago I found one in my yard. I had never heard of one being anywhere near us till I found her and she was gravid so there were many more that I didn't see.
     
  3. myrmecophile

    myrmecophile Arachnobaron Old Timer


    A while back someone PMed me asking if I would sell them brown widows, I told them no, I killed them when I found them. the following is the response I got them. Ants in general are hardly pest insects. Some people just don't get it. I have no doubt they are continuing to spread, they will continue to wreak ecological havoc where ever the environment is favorable.

    "
    The spider is a beneficial organism to farmers. What you are doing is counter productive. You'd be better served doing this to ants. I have several organic methods of killing them from use of parasites to specialized viruses. I hope to find even more effective vectors in the new year. The brown widow's success as a beneficial predator is a bar that has been set. We must responsibly eliminate pest insects like ants that damage food crops. Here's to a productive New Year."
     
  4. Fishman

    Fishman Arachnopeon

    [​IMG]

    Female Redback Spider
    The Business end:-
    [​IMG]


    The Stripe which is so distinguishing
    [​IMG][​IMG]


    A smaller one, less mature version showing crenelated stripe common to younger ones
    [​IMG]
    Typical mess of web with egg sacs on dark tight space.
    [​IMG]

    Enjoy, they're everywhere here. Nothing to really worry about, just don't put your pants on without shaking them out in the morning.
     
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  5. Widow lover

    Widow lover Arachnoknight Arachnosupporter


    That's latrodectus variolus.....
    Hasselti juveniles don't look anything like that.
     
  6. Widow lover

    Widow lover Arachnoknight Arachnosupporter

    Juvenile mactans
     
  7. USMuscle9403

    USMuscle9403 Arachnosquire Old Timer

    I guess it's not entirely impossible for a hasselti to take up residence here, but if it was mature, it may have just been variolus. I've seen L. variolus carry the dorsal stripe well into adulthood.
     
  8. Dustinzor

    Dustinzor Arachnopeon

    I live in Colorado and just found this specimen in my bathroom. When I did some internet searching, it looked like a female Redback, but that searching also led me here. What do you guys think?
    15056374_10100623297110889_9193416860954675772_n.jpg
     
  9. pannaking22

    pannaking22 Arachnoking Active Member

    Nope, not a redback. Lots of other markings on the abdomen, whereas hasselti have just the single giant band. My guess would be hesperus but I'm not an expert on widow ID like @Widow lover is.
     
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  10. I agree with L. hesperus
     
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  11. Widow lover

    Widow lover Arachnoknight Arachnosupporter

    L
    . Hesperus
     
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  12. JAFUENTES

    JAFUENTES Arachnoknight Arachnosupporter

  13. The Snark

    The Snark Dancing with the enemy gods Old Timer

    Hasseltti juvenile
    [​IMG]

    (Young Australian redback spider. Taken December 2010 in Sydney, by Phil Bentley (www.localoptimum.com))
     
  14. Malmignatte

    Malmignatte Arachnopeon

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    Iread some time ago that red backs were in Houston Texas.but so what,usa has plenty of widow spiders and their all roughly the same in the venom.
     
  15. pannaking22

    pannaking22 Arachnoking Active Member

    Where did you find that? I'd be interested to read it. There shouldn't be any hasselti in Houston, but some of the subspecies of hesperus look quite a bit like hasselti
     
  16. Ungoliant

    Ungoliant Arachnoprince Active Member

    People often mistake juvenile black widows (or even adult Latrodectus variolus) with redbacks, because they have red markings on the dorsal side of the abdomen.
     
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  17. Hanaleblanc

    Hanaleblanc Arachnopeon

    Ok...first time I have ever seen one of these. I'm familiar with a black widow and brown widow and recluse. I'm in Louisiana so weather is good for them here. I know this isn't a great pic but I wasn't getting any closer. Help...bc I will probably loose sleep over this.
     

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  18. Ungoliant

    Ungoliant Arachnoprince Active Member

    This one is not even a widow spider. It's a harmless antmimic in the genus Castianeira, specifically C. crocata or C. descripta.

    BugGuide does not currently have any submissions of your species from Louisiana, so I'd encourage you to submit it there.
     
  19. Malmignatte

    Malmignatte Arachnopeon

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    Iread this some yrs ago right here in this forum and head line read Houston we have a problem.lol
     
  20. OkWyatt

    OkWyatt Arachnopeon

    Can someone help me to identify this spider? It was inside a toy outside and brought inside by my kiddo. It was guarding an egg sac.
     

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