It’s true – I did use that extreme title on purpose, in part because I feel it important to contrast the incredible volume of misinformation out on the Internet about “deadly” spiders.Īnother photo of Cheiracanthum inclusum (C) J. I argued previously that spiders bites are exceedingly rare, and attention should be paid to more likely causes.īy the way, that previous post has received a lot of attention, and I was rightfully accused of using a provocative title. The million dollar question: do they bite humans? Any of you that have been following my blog will know my opinions about spiders biting humans. This means there you are most likely living in very close association with these spiders every day, and that they are likely distributed across most of (populated) North America. Personally, I think that “ceiling spider” is a better common name, because that’s where they are very commonly found.Īlmost every house that I go into has Cheiracanthum tucked away up in the ceiling, and I think most Arachnologists would support this claim. The yellow part obviously refers to their cream-like colouring. This common name is largely a hold-over from when Cheiracanthum was previously within in the family Clubionidae, which are all commonly called “sac spiders”. ![]() ![]() Searches on the Internet (and sometimes in the scientific literature) reveal that these are commonly referred to as “ yellow sac spiders“. In North America, the two species of Cheiracanthum that you may find in your home are C.
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