7 Most Dangerous Spiders in the World

spiders
Photo by Ken Griffiths from Shutterstock

Queensland Whistling Tarantula

The Queensland whistling tarantula, also known as Selenocosmia crassipes, is a dangerous species of tarantula that can be found in Queensland, Australia. Their name comes from their ability to make a whistle-like noise when threatened or provoked. Its body length (without legs) can reach up to 9 cm (3.5 in.) and according to animal experts, they are the largest Australian tarantula. 

It seems that their venom is not fatal to humans, but it can cause severe health complications, such as vomiting for up to eight hours. When it comes to the impact of venom on other animals, it can actually kill a large dog breed in less than thirty minutes. Their diet consists of insects, other spiders, geckos, skinks, and frogs. 

According to an Australian researcher who was bitten by a whitling tarantula, “the pain was so intense that sleep that night was impossible. Fifteen hours post-bite, the adjoining finger, and upper hand were also swollen and painful.”

In addition, one of the most important things that you have to consider when it comes to whistling tarantula bites is to seek immediate medical care because the venom can cause severe complications. 

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53 Responses

  1. They left off probably the two most dangerous spiders there are: The Brazilian Wandering Spider (or Banana Spider) and the Funnel Web Spider from Australia. Both can cause death to humans.

    1. They DID list the Brazilian but not the funnel web, which is a massive oversight, those things are deadly!

    2. I totally agree, at least in the realm of the likelihood that you’ll encounter the species…
      I’ve had personally lost people to both of those.

    3. Also have been bitten once by a Brown Recluse which made a 2cm x 2cm hole in my arm and twice by the New Zealand Black Widow aka Katipo without more than a mild fever and localized pain. They should have pictured a Hobo which is the 2nd. most likely to be encountered.

  2. Yes, OMG, I am sooooo afraid of sppiders and every night before I go to bed, I check out the ceiling, and every other place in my room that I might think one of those icky things may be hiding!!! I hate them more than anything else, or should I say that I am afraid of spiders more than anything else !

    1. Make sure you plug in a ultrasonic sensor with a blue light. Spiders HATE blue lights. They ABSOLUTELY HATE THEM, and will stay away at the sight of them.

    2. Ditto that my friend! I am so afraid of them as well!
      I know when one is around me as well!
      I can sense it!

  3. Echoing Marc’s comment, I don’t think there’s a deadlier spider on earth than Australia’s Sydney funnelweb spider. If it is fully loaded with venom when it strikes, it can kill a healthy young adult human within 20 minutes, and there is no antivenin. This one is very aggressive and deadlier than the Brazilian wanderer.

    1. An antivenom for the Sydney Funnel-web Spider was first developed for clinical use in 1981 by Dr Struan Sutherland and his team at the Commonwealth Serum Laboratories. No deaths have occurred since its introduction.

  4. Both the Brazilian wondering banana spider and the funnel spider were mentioned and given their due respect

  5. I have always been under the impression that the male Sydney funnel web was the second most dangerous spider in the world next to the Brazilian wandering spider. Why didn’t the funnel web even make the list?

  6. Even the Wolf Spider can trigger Anaphylaxis, which can be deadly for some. It isn’t necessarily the venom or poison, but the individual’s reaction to the toxin.

  7. My phone only went as far as read on for more info, then an ad for tasting and the comments! Android prob.?!?

    1. Black Widows can be found in the United States. I live in Maryland and I’ve seen them twice. They love to hide in wood piles so if you have a fireplace, keep an eye out.👀

    1. I think I have one or the other living under a movable step to my back door. I see it out sunning on the step a few times a year.

    2. Both were mentioned but the Black Widow doesn’t belong here…
      Common s dirt here in AZ. I just removed five from under my kitchen table and several more from my patio…

  8. Number 7 does nothing. No picture, it stops at 6. I sure would like to see a picture of the most dangerous spider. Good tip about the blue light. I have a ionizer plugged into a socket and it has a blue light. Protected and didn’t know it. Also wolf spiders are in the US. Had one crawl across our blanket at an outdoor concert in No. Carolina. It is a big one. I was just about to lay down on the blanket until someone said “I wouldn’t lay down if I were you!” It was at a racetrack. Thank the lord for that person.

  9. My son is 6’3″ tall and weighs 240 lbs. He is terrified of spiders. I’m the same size and I can’t stand snakes. Doesn’t matter what kind I fear them all.

  10. My son was bitten by a brown recluse spider. He ended up in the hospital and when released had a visiting nurse come 3 days a week because he had a portal for medication. He lived in Florida at the time and I live in Pennsylvania, but I remember his doctor saying that he was very ill. When he was better he had an indention about 1/4 inch deep and the size of a dollar bill in his shin. It never went away.

  11. Very dangerous ….I just had a perfectly healthy Rottweiler get bite by a Brown Recluse and within three days die!!! It turned into a horrific flesh eating poison. Just happened last week in Arizona, they said they had never seen anything so bad and so expedited in progression.

  12. The Port of Houston, spider gateway to the USA, every creature than can get on a ship, HAS, the area around it is ground zero, if it’s on planet Earth it’s in Houston, ooooh nooo.

  13. I was bitten by a brown recluse on my neck while sleeping and didn’t feel a thing. I touched neck and it was really sore. I had a my grown daughter look at it as I hadn’t checked it out in a mirror and she thought my husband had given me a hickey. Nope to that and off the ER for me and was put in antibiotics.

  14. I am not afraid of spiders at all. They are one of the most beneficial insects we have. If it weren’t for spiders, we would be overrun by other insects. Spiders are more leery of humans than we are of them. I don’t kill spiders — if I find one in the house, I catch him and take him outside — where he would rather be. I think many spiders are beautiful.

  15. How old are spiders? Did you guys come in about is in the article at least I read it in the article. Maybe I have a different article than you guys reading

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