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Are spiders unable to hurt humans, especially very small spiders?



The 2019 Stack Overflow Developer Survey Results Are InIs Australian fauna more dangerous?Are humans the only species to have homophobes?Are (wild) elephants afraid of mice?Did humans see fish at the bottom of the world's deepest trench, the Mariana trench?Can trained humans run faster than all other animals on a marathon distance?Is the total biomass of ants roughly equal to the total biomass of humans?Are 100 million sharks killed by humans per year?Are any animals nocturnal?Is it very difficult to kill a whale at sea humanely?Are these photos strong evidence of mermaids?Are chicken haunches especially toxic?










1















In an episode of Peppa Pig, one of the characters says that spiders are very very small, and that they can’t hurt you.



Broadcasters in Australia have avoided broadcasting the episode involved, because they’re worried that viewers will regard the claim as factually true.



Are spiders unable to hurt people? Also, does size have anything to do with whether they can harm you?



I’m primarily interested in whether spiders are harmful to humans, not whether they can affect pigs, and I’m interested in whether it’s true in all countries, though if it’s untrue worldwide, I’d like to know if it is at least true in the country Peppa Pig was created in (the UK), as opposed to the deathworld which is Australia.










share|improve this question




























    1















    In an episode of Peppa Pig, one of the characters says that spiders are very very small, and that they can’t hurt you.



    Broadcasters in Australia have avoided broadcasting the episode involved, because they’re worried that viewers will regard the claim as factually true.



    Are spiders unable to hurt people? Also, does size have anything to do with whether they can harm you?



    I’m primarily interested in whether spiders are harmful to humans, not whether they can affect pigs, and I’m interested in whether it’s true in all countries, though if it’s untrue worldwide, I’d like to know if it is at least true in the country Peppa Pig was created in (the UK), as opposed to the deathworld which is Australia.










    share|improve this question


























      1












      1








      1








      In an episode of Peppa Pig, one of the characters says that spiders are very very small, and that they can’t hurt you.



      Broadcasters in Australia have avoided broadcasting the episode involved, because they’re worried that viewers will regard the claim as factually true.



      Are spiders unable to hurt people? Also, does size have anything to do with whether they can harm you?



      I’m primarily interested in whether spiders are harmful to humans, not whether they can affect pigs, and I’m interested in whether it’s true in all countries, though if it’s untrue worldwide, I’d like to know if it is at least true in the country Peppa Pig was created in (the UK), as opposed to the deathworld which is Australia.










      share|improve this question
















      In an episode of Peppa Pig, one of the characters says that spiders are very very small, and that they can’t hurt you.



      Broadcasters in Australia have avoided broadcasting the episode involved, because they’re worried that viewers will regard the claim as factually true.



      Are spiders unable to hurt people? Also, does size have anything to do with whether they can harm you?



      I’m primarily interested in whether spiders are harmful to humans, not whether they can affect pigs, and I’m interested in whether it’s true in all countries, though if it’s untrue worldwide, I’d like to know if it is at least true in the country Peppa Pig was created in (the UK), as opposed to the deathworld which is Australia.







      zoology toxicology






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 54 mins ago









      Oddthinking

      102k31427531




      102k31427531










      asked 3 hours ago









      Andrew GrimmAndrew Grimm

      21.8k27105299




      21.8k27105299




















          2 Answers
          2






          active

          oldest

          votes


















          4














          The answer is that spiders definitely can hurt you. While you may not be likely to be killed, spiders can absolutely hurt you, whether from a large one's bite (whether venomous or not) or from any venomous spider.



          Australia is probably the best case here, and while they have only had one death from spider bite in 40 years (from a redback bite) this is considered to be mostly because:




          an effective antivenom for redback spiders was developed in 1956, and one for funnel-web spiders in 1980.




          from australianmuseum.net.au



          Also on that page:




          ...on current evidence the most dangerous spiders in the world are funnel-web spiders (Atrax and Hadronyche species), Redback Spiders and their relations (Latrodectus species), Banana Spiders (Phoneutria species) and Recluse Spiders (Loxosceles species). In Australia, only male Sydney Funnel Web Spiders and Redback Spiders have caused human deaths, but none have occurred since antivenoms were made available in 1981.




          In the UK (from sciencefocus.com):




          three common spiders that are capable of biting you: the cellar spider, the woodlouse spider and the false widow spider. Their bites are painful and have been known to cause swelling for a few hours. In 2014 a 60-year-old woman died after being bitten by a false widow spider.




          The false widow, cellar, woodlouse and redback are all pretty small, at around 1cm. A funnel-web can be up to about 5cm, so that probably doesn't count as small



          Anecdotally, my son was bitten by a false widow in the summer of 2018 in Scotland, and after falling very ill and having his entire forearm swell up, with the central bite area becoming necrotic, he required emergency treatment, was in hospital for surgery, and a few days stay in the plastic surgery ward at St. Johns Hospital in Livingston. He still has a rather nasty scar on his arm, but thus far has not developed any strange powers...






          share|improve this answer

























          • I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

            – David Hammen
            2 hours ago







          • 1





            the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

            – Rory Alsop
            2 hours ago











          • Fixed it @DavidHammen - updated my post, and edited the question title

            – Rory Alsop
            2 hours ago











          • Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

            – Oddthinking
            51 mins ago











          • @Oddthinking: LOL.

            – Fizz
            35 mins ago


















          3















          Are spiders unable to hurt people?




          There are several species of spiders, some large, others not so large. that are quite capable of harming people. Some can cause severe injury to or kill people. Three requirements:



          • The fangs need to be large enough to puncture the epidermis.

            The human epidermis is thick enough to render what otherwise would be harmful small creatures impotent with regard to humans.

          • The injected poison needs to be potentially harmful to people.

            Some spiders inject poisons that are very harmful to insects but have little impact on humans. But other spiders inject poisons that are potentially harmful to all animal life.

          • The amount of poison injected needs to be potentially harmful to people.

            A spider that injects a tiny amount of what would deadly poison in much larger amounts is not harmful. The dosage makes the poison poisonous.

          Some spiders pass all three requirements. People have died or lost appendages due to spider bites. Australia appears to be the worst place, but very poisonous spiders do exist elsewhere. The Americas, for example, are home to several species of spiders that can be quite harmful to people, and even on occasion can kill. From Spider: This Bites: Venomous Texas Spiders,




          The venom of the black widow is a neurotoxin and can lead to severe systemic reactions and in rare cases, death. The black widow's venom is reportedly 15 times more toxic than the venom of the prairie rattlesnake. However, only a minute quantity is injected with each bite.




          and




          Brown recluse spiders are golden brown in color and can be identified by the characteristic dark brown to black fiddle-shaped pattern on the head region. Brown recluse venom has necrotizing enzymes that generally cause local or systemic reactions.




          Black widows are largish (but not huge) spiders, brown recluses, not so large.






          share|improve this answer
































            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            4














            The answer is that spiders definitely can hurt you. While you may not be likely to be killed, spiders can absolutely hurt you, whether from a large one's bite (whether venomous or not) or from any venomous spider.



            Australia is probably the best case here, and while they have only had one death from spider bite in 40 years (from a redback bite) this is considered to be mostly because:




            an effective antivenom for redback spiders was developed in 1956, and one for funnel-web spiders in 1980.




            from australianmuseum.net.au



            Also on that page:




            ...on current evidence the most dangerous spiders in the world are funnel-web spiders (Atrax and Hadronyche species), Redback Spiders and their relations (Latrodectus species), Banana Spiders (Phoneutria species) and Recluse Spiders (Loxosceles species). In Australia, only male Sydney Funnel Web Spiders and Redback Spiders have caused human deaths, but none have occurred since antivenoms were made available in 1981.




            In the UK (from sciencefocus.com):




            three common spiders that are capable of biting you: the cellar spider, the woodlouse spider and the false widow spider. Their bites are painful and have been known to cause swelling for a few hours. In 2014 a 60-year-old woman died after being bitten by a false widow spider.




            The false widow, cellar, woodlouse and redback are all pretty small, at around 1cm. A funnel-web can be up to about 5cm, so that probably doesn't count as small



            Anecdotally, my son was bitten by a false widow in the summer of 2018 in Scotland, and after falling very ill and having his entire forearm swell up, with the central bite area becoming necrotic, he required emergency treatment, was in hospital for surgery, and a few days stay in the plastic surgery ward at St. Johns Hospital in Livingston. He still has a rather nasty scar on his arm, but thus far has not developed any strange powers...






            share|improve this answer

























            • I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

              – David Hammen
              2 hours ago







            • 1





              the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

              – Rory Alsop
              2 hours ago











            • Fixed it @DavidHammen - updated my post, and edited the question title

              – Rory Alsop
              2 hours ago











            • Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

              – Oddthinking
              51 mins ago











            • @Oddthinking: LOL.

              – Fizz
              35 mins ago















            4














            The answer is that spiders definitely can hurt you. While you may not be likely to be killed, spiders can absolutely hurt you, whether from a large one's bite (whether venomous or not) or from any venomous spider.



            Australia is probably the best case here, and while they have only had one death from spider bite in 40 years (from a redback bite) this is considered to be mostly because:




            an effective antivenom for redback spiders was developed in 1956, and one for funnel-web spiders in 1980.




            from australianmuseum.net.au



            Also on that page:




            ...on current evidence the most dangerous spiders in the world are funnel-web spiders (Atrax and Hadronyche species), Redback Spiders and their relations (Latrodectus species), Banana Spiders (Phoneutria species) and Recluse Spiders (Loxosceles species). In Australia, only male Sydney Funnel Web Spiders and Redback Spiders have caused human deaths, but none have occurred since antivenoms were made available in 1981.




            In the UK (from sciencefocus.com):




            three common spiders that are capable of biting you: the cellar spider, the woodlouse spider and the false widow spider. Their bites are painful and have been known to cause swelling for a few hours. In 2014 a 60-year-old woman died after being bitten by a false widow spider.




            The false widow, cellar, woodlouse and redback are all pretty small, at around 1cm. A funnel-web can be up to about 5cm, so that probably doesn't count as small



            Anecdotally, my son was bitten by a false widow in the summer of 2018 in Scotland, and after falling very ill and having his entire forearm swell up, with the central bite area becoming necrotic, he required emergency treatment, was in hospital for surgery, and a few days stay in the plastic surgery ward at St. Johns Hospital in Livingston. He still has a rather nasty scar on his arm, but thus far has not developed any strange powers...






            share|improve this answer

























            • I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

              – David Hammen
              2 hours ago







            • 1





              the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

              – Rory Alsop
              2 hours ago











            • Fixed it @DavidHammen - updated my post, and edited the question title

              – Rory Alsop
              2 hours ago











            • Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

              – Oddthinking
              51 mins ago











            • @Oddthinking: LOL.

              – Fizz
              35 mins ago













            4












            4








            4







            The answer is that spiders definitely can hurt you. While you may not be likely to be killed, spiders can absolutely hurt you, whether from a large one's bite (whether venomous or not) or from any venomous spider.



            Australia is probably the best case here, and while they have only had one death from spider bite in 40 years (from a redback bite) this is considered to be mostly because:




            an effective antivenom for redback spiders was developed in 1956, and one for funnel-web spiders in 1980.




            from australianmuseum.net.au



            Also on that page:




            ...on current evidence the most dangerous spiders in the world are funnel-web spiders (Atrax and Hadronyche species), Redback Spiders and their relations (Latrodectus species), Banana Spiders (Phoneutria species) and Recluse Spiders (Loxosceles species). In Australia, only male Sydney Funnel Web Spiders and Redback Spiders have caused human deaths, but none have occurred since antivenoms were made available in 1981.




            In the UK (from sciencefocus.com):




            three common spiders that are capable of biting you: the cellar spider, the woodlouse spider and the false widow spider. Their bites are painful and have been known to cause swelling for a few hours. In 2014 a 60-year-old woman died after being bitten by a false widow spider.




            The false widow, cellar, woodlouse and redback are all pretty small, at around 1cm. A funnel-web can be up to about 5cm, so that probably doesn't count as small



            Anecdotally, my son was bitten by a false widow in the summer of 2018 in Scotland, and after falling very ill and having his entire forearm swell up, with the central bite area becoming necrotic, he required emergency treatment, was in hospital for surgery, and a few days stay in the plastic surgery ward at St. Johns Hospital in Livingston. He still has a rather nasty scar on his arm, but thus far has not developed any strange powers...






            share|improve this answer















            The answer is that spiders definitely can hurt you. While you may not be likely to be killed, spiders can absolutely hurt you, whether from a large one's bite (whether venomous or not) or from any venomous spider.



            Australia is probably the best case here, and while they have only had one death from spider bite in 40 years (from a redback bite) this is considered to be mostly because:




            an effective antivenom for redback spiders was developed in 1956, and one for funnel-web spiders in 1980.




            from australianmuseum.net.au



            Also on that page:




            ...on current evidence the most dangerous spiders in the world are funnel-web spiders (Atrax and Hadronyche species), Redback Spiders and their relations (Latrodectus species), Banana Spiders (Phoneutria species) and Recluse Spiders (Loxosceles species). In Australia, only male Sydney Funnel Web Spiders and Redback Spiders have caused human deaths, but none have occurred since antivenoms were made available in 1981.




            In the UK (from sciencefocus.com):




            three common spiders that are capable of biting you: the cellar spider, the woodlouse spider and the false widow spider. Their bites are painful and have been known to cause swelling for a few hours. In 2014 a 60-year-old woman died after being bitten by a false widow spider.




            The false widow, cellar, woodlouse and redback are all pretty small, at around 1cm. A funnel-web can be up to about 5cm, so that probably doesn't count as small



            Anecdotally, my son was bitten by a false widow in the summer of 2018 in Scotland, and after falling very ill and having his entire forearm swell up, with the central bite area becoming necrotic, he required emergency treatment, was in hospital for surgery, and a few days stay in the plastic surgery ward at St. Johns Hospital in Livingston. He still has a rather nasty scar on his arm, but thus far has not developed any strange powers...







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited 2 hours ago

























            answered 2 hours ago









            Rory AlsopRory Alsop

            4,60722541




            4,60722541












            • I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

              – David Hammen
              2 hours ago







            • 1





              the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

              – Rory Alsop
              2 hours ago











            • Fixed it @DavidHammen - updated my post, and edited the question title

              – Rory Alsop
              2 hours ago











            • Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

              – Oddthinking
              51 mins ago











            • @Oddthinking: LOL.

              – Fizz
              35 mins ago

















            • I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

              – David Hammen
              2 hours ago







            • 1





              the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

              – Rory Alsop
              2 hours ago











            • Fixed it @DavidHammen - updated my post, and edited the question title

              – Rory Alsop
              2 hours ago











            • Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

              – Oddthinking
              51 mins ago











            • @Oddthinking: LOL.

              – Fizz
              35 mins ago
















            I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

            – David Hammen
            2 hours ago






            I think you have the sense of the question backwards. The question asks in the title "Are spiders unable to hurt people?" and in the body "Are spiders unable to hurt people?" A positive answer (i.e., your initial "Yes") says that spiders are incapable of hurting people. The rest of your answer properly answers in the negative. Some spiders are quite capable of harming or possibly even killing people.

            – David Hammen
            2 hours ago





            1




            1





            the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

            – Rory Alsop
            2 hours ago





            the title is actually weirder than that - the wording implication is around whether they can stop themselves hurting you :-)

            – Rory Alsop
            2 hours ago













            Fixed it @DavidHammen - updated my post, and edited the question title

            – Rory Alsop
            2 hours ago





            Fixed it @DavidHammen - updated my post, and edited the question title

            – Rory Alsop
            2 hours ago













            Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

            – Oddthinking
            51 mins ago





            Just to be clear, the last paragraph is an anecdote, and hence not strong evidence that spider bites can't give people strange superpowers.

            – Oddthinking
            51 mins ago













            @Oddthinking: LOL.

            – Fizz
            35 mins ago





            @Oddthinking: LOL.

            – Fizz
            35 mins ago











            3















            Are spiders unable to hurt people?




            There are several species of spiders, some large, others not so large. that are quite capable of harming people. Some can cause severe injury to or kill people. Three requirements:



            • The fangs need to be large enough to puncture the epidermis.

              The human epidermis is thick enough to render what otherwise would be harmful small creatures impotent with regard to humans.

            • The injected poison needs to be potentially harmful to people.

              Some spiders inject poisons that are very harmful to insects but have little impact on humans. But other spiders inject poisons that are potentially harmful to all animal life.

            • The amount of poison injected needs to be potentially harmful to people.

              A spider that injects a tiny amount of what would deadly poison in much larger amounts is not harmful. The dosage makes the poison poisonous.

            Some spiders pass all three requirements. People have died or lost appendages due to spider bites. Australia appears to be the worst place, but very poisonous spiders do exist elsewhere. The Americas, for example, are home to several species of spiders that can be quite harmful to people, and even on occasion can kill. From Spider: This Bites: Venomous Texas Spiders,




            The venom of the black widow is a neurotoxin and can lead to severe systemic reactions and in rare cases, death. The black widow's venom is reportedly 15 times more toxic than the venom of the prairie rattlesnake. However, only a minute quantity is injected with each bite.




            and




            Brown recluse spiders are golden brown in color and can be identified by the characteristic dark brown to black fiddle-shaped pattern on the head region. Brown recluse venom has necrotizing enzymes that generally cause local or systemic reactions.




            Black widows are largish (but not huge) spiders, brown recluses, not so large.






            share|improve this answer





























              3















              Are spiders unable to hurt people?




              There are several species of spiders, some large, others not so large. that are quite capable of harming people. Some can cause severe injury to or kill people. Three requirements:



              • The fangs need to be large enough to puncture the epidermis.

                The human epidermis is thick enough to render what otherwise would be harmful small creatures impotent with regard to humans.

              • The injected poison needs to be potentially harmful to people.

                Some spiders inject poisons that are very harmful to insects but have little impact on humans. But other spiders inject poisons that are potentially harmful to all animal life.

              • The amount of poison injected needs to be potentially harmful to people.

                A spider that injects a tiny amount of what would deadly poison in much larger amounts is not harmful. The dosage makes the poison poisonous.

              Some spiders pass all three requirements. People have died or lost appendages due to spider bites. Australia appears to be the worst place, but very poisonous spiders do exist elsewhere. The Americas, for example, are home to several species of spiders that can be quite harmful to people, and even on occasion can kill. From Spider: This Bites: Venomous Texas Spiders,




              The venom of the black widow is a neurotoxin and can lead to severe systemic reactions and in rare cases, death. The black widow's venom is reportedly 15 times more toxic than the venom of the prairie rattlesnake. However, only a minute quantity is injected with each bite.




              and




              Brown recluse spiders are golden brown in color and can be identified by the characteristic dark brown to black fiddle-shaped pattern on the head region. Brown recluse venom has necrotizing enzymes that generally cause local or systemic reactions.




              Black widows are largish (but not huge) spiders, brown recluses, not so large.






              share|improve this answer



























                3












                3








                3








                Are spiders unable to hurt people?




                There are several species of spiders, some large, others not so large. that are quite capable of harming people. Some can cause severe injury to or kill people. Three requirements:



                • The fangs need to be large enough to puncture the epidermis.

                  The human epidermis is thick enough to render what otherwise would be harmful small creatures impotent with regard to humans.

                • The injected poison needs to be potentially harmful to people.

                  Some spiders inject poisons that are very harmful to insects but have little impact on humans. But other spiders inject poisons that are potentially harmful to all animal life.

                • The amount of poison injected needs to be potentially harmful to people.

                  A spider that injects a tiny amount of what would deadly poison in much larger amounts is not harmful. The dosage makes the poison poisonous.

                Some spiders pass all three requirements. People have died or lost appendages due to spider bites. Australia appears to be the worst place, but very poisonous spiders do exist elsewhere. The Americas, for example, are home to several species of spiders that can be quite harmful to people, and even on occasion can kill. From Spider: This Bites: Venomous Texas Spiders,




                The venom of the black widow is a neurotoxin and can lead to severe systemic reactions and in rare cases, death. The black widow's venom is reportedly 15 times more toxic than the venom of the prairie rattlesnake. However, only a minute quantity is injected with each bite.




                and




                Brown recluse spiders are golden brown in color and can be identified by the characteristic dark brown to black fiddle-shaped pattern on the head region. Brown recluse venom has necrotizing enzymes that generally cause local or systemic reactions.




                Black widows are largish (but not huge) spiders, brown recluses, not so large.






                share|improve this answer
















                Are spiders unable to hurt people?




                There are several species of spiders, some large, others not so large. that are quite capable of harming people. Some can cause severe injury to or kill people. Three requirements:



                • The fangs need to be large enough to puncture the epidermis.

                  The human epidermis is thick enough to render what otherwise would be harmful small creatures impotent with regard to humans.

                • The injected poison needs to be potentially harmful to people.

                  Some spiders inject poisons that are very harmful to insects but have little impact on humans. But other spiders inject poisons that are potentially harmful to all animal life.

                • The amount of poison injected needs to be potentially harmful to people.

                  A spider that injects a tiny amount of what would deadly poison in much larger amounts is not harmful. The dosage makes the poison poisonous.

                Some spiders pass all three requirements. People have died or lost appendages due to spider bites. Australia appears to be the worst place, but very poisonous spiders do exist elsewhere. The Americas, for example, are home to several species of spiders that can be quite harmful to people, and even on occasion can kill. From Spider: This Bites: Venomous Texas Spiders,




                The venom of the black widow is a neurotoxin and can lead to severe systemic reactions and in rare cases, death. The black widow's venom is reportedly 15 times more toxic than the venom of the prairie rattlesnake. However, only a minute quantity is injected with each bite.




                and




                Brown recluse spiders are golden brown in color and can be identified by the characteristic dark brown to black fiddle-shaped pattern on the head region. Brown recluse venom has necrotizing enzymes that generally cause local or systemic reactions.




                Black widows are largish (but not huge) spiders, brown recluses, not so large.







                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 2 hours ago

























                answered 2 hours ago









                David HammenDavid Hammen

                6,79142930




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