Friday July 25 2014
Science Photo Answer #841

Science photo 841

Nancy found this spider today, and I thought at first glance that it might be a Hobo spider. What is special about Hobo spiders?


Hobo spiders probably have some of the worst PR in the spider world. Because of its scientific name (Tegenaria agrestis), it is often called the Aggressive House Spider. Actually, agrestis means rural, not aggressive, but it still gets an undeserved reputation for being aggressive. In 1987, a researcher reported that Hobo spider venom had caused lesions and tissue damage to rabbits, producing results much like the bite of a brown recluse spider. That one study had a huge impact. A quick internet search will show thousands of sites detailing the dangers of Hobo spiders. Repeated attempts to replicate that study have failed to support the idea that these spiders are dangerous to people, including a study published in the Journal of Medical Entomology which tested the spider's venom and found that it is incapable of causing the type of lesions described in the first study. You can find the study here: http://www.bioone.org/doi/abs/10.1603/ME09224

This is an excellent example of why it is so important to fact check scientific information.

Cool

Cool

DEADLY SPIDER

WATCH OUT ITS DEADLY! LET IT FREE OUTSIDE FAR AWAY

ITS DEADLY

THEY ARE VERY DANGEORUS! BE CAREFUL LET IT FREE OUT SIDE FAR AWAY. THEY ARE DEADLY.

I think I saw one of those

I think I saw one of those spiders, unless it lives in a different part of the world. But I still don`t know if it is that spider or not.I live in New Jersey.

Bold common house spider

Here on the western slope of Colorado, these spiders are all over. They are fast and aggressive in that they are not afraid. The black widow will crouch down, clearly afraid when disturbed or discovered.
My hubby was bit by the common house spider. It was inside his robe (that he wore every morning). The bite was right on the uppermost part the backside of his thigh. It did cause tissue damage, though no where near as serious as a recluse bite (seen one of those, too. A girl I'm my platoon was discharged from basic training in SC from the bite.)
His started as a bite, turned into a dime sized area of red raw skin that healed in 2 weeks.

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