Monday, February 06, 2012

Myths about "Dangerous" Spiders

We got this in our English for Professional Purposes today, and I thought it was really interesting.

Myth: Tarantulas are dangerous or deadly to humans.
Female European Tarantula (a wolf spider) in burrow Female Pink Toe Tarantula from above
European tarantula
Lycosa tarantula
Southern Europe; body length 2-3 cm
  (photo: Manuel J. Cabrero)
Pink toe tarantula
Avicularia avicularia
Brazil to Trinidad; body length 6-7 cm
   (photo by Ron Taylor)
Both the European wolf spiders (left) originally called tarantulas, and the theraphosid spiders (right), often kept as pets and called tarantulas now, have been reputed dangerous to humans. They aren't.

Fact: Outside of southern Europe (where the name is used for a wolf spider, famous in medieval superstition as the alleged cause of "tarantella" dancing), the word tarantula is most often used for the very large, furry spiders of the family Theraphosidae.

Hollywood is squarely to blame for these spiders' toxic-to-humans reputation. Tarantulas are large, photogenic and most are easily handled, and therefore they have been very widely used in horror and action-adventure movies. When some "venomous" creature is needed to menace James Bond or Indiana Jones, to invade a small town in enormous numbers, or to grow to gigantic size and prowl the Arizona desert for human prey, the special-effects team calls out the tarantulas!

In reality, the venom of these largest-of-all-spiders generally has very low toxicity to humans. I myself was once bitten by a Texan species and hardly even felt it. None of the North American species or those commonly kept as pets are considered to pose even a mild bite hazard. There have now been a few credible reports of moderate illness from the bites of a few exotic species that are definitely not standard pet store material. However, other people bitten by these same species reported no more than an initial "ouch" and perhaps a little muscle cramping.

The only health hazard posed by keeping pet tarantulas comes from the irritating hairs of the abdomen (in New World species), which can cause skin rashes or inflammation of eyes and nasal passages. To prevent such problems, simply keep tarantulas away from your face and wash your hands after handling one.

Compared to common pets such as dogs, tarantulas are not dangerous at all.


1 comment:

Soncek said...

Another good example how you can be misled :)