Fri 26 Jan 2007
Ultraviolet light key to spider mating, Vampire repulsion.
Posted by crank20 under Real News , ScienceNo Comments
How do you get a spider in the mood? Pour some wine, drop the needle on a scratchy Barry White album, and un-dim the ultraviolet lights. Ohhh yeah, baby. Just like the human species crica 1978… nothing sets the scene like the back of a van with shag carpet, avacado-green bean-bag chairs, and Jimi Hendrix posters glowing in beautiful black-lights.
Same for spiders, though instead of glowing guitars and unicorns… it’s their face that glows in ultraviolet light. And the ladies? Oh yeah… they swoon. Big time.
Apparently both male and female jumping spiders, Cosmophasis umbratica, have markings on their faces and legs that glow in ultraviolet light, researchers led by Daiqin Li at the National University of Singapore reported, before carefully coming down from their chairs and lab tables… trying their best to stifle a quiet, “eww… spiders.”
Many animals possess UV vision and use it for foraging, navigation and sexual selection, Li explained. Jumping spiders are known to have good eyesight, he said, adding that many of these spiders are colorful, with the males generally more colorful than females.
So if you happen to know of someone who is a little put-off by the creepy-crawly critters, now you know what to get them for your next gift exchange. Natural, wholesome ultraviolet lights for their basement. “Helps kill mold!,” you might explain.

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were glued together by artist Bryan Berg to produce a life-size replica of the “Welcome to Fabulous Las Vegas” sign.