<p>If you thought going to the club was bad, imagine having to dance in front of potential mates for over an hour and a half, lest they will eat you. Male Australian redback <a href="http://blogs.discovermagazine.com/discoblog/tag/spiders/" title="">spiders</a>, members of the black widow family, pay the ultimate price if their <a href="http://blogs.discovermagazine.com/discoblog/category/sex-mating/" title="">mating</a> dance doesn't impress. Here's how it works, via <a href="http://www.livescience.com/animals/091102-sneaky-spider.html" title="">Livescience.com</a>: </p><div class="vert-display-toggle collapsible relative flex flex-col items-center "><div class="vert-unit mt-4 mb-3 top-20"><div ad-type="mobile-desktop" class="ad-wrapper vert min-h-boombox flex items-start justify-center" data-ad-mapping="inline" data-ad-slot="Discover/inline-ad" id="div-inline-ad-0"></div></div><span aria-label="Advertisement" class="text-ad mt-1 text-[11px] uppercase">Advertisement</span></div><blockquote><p>Males, which are just 1 percent to 2 percent of a female's body weight, dance about the web of a potential mate, plucking at the threads and sending out vibrations. Once the male redback has performed an adequate dance, the female will allow him to mount her and insert one of his two palps, or copulatory organs, into one of a pair of sperm storage organs. The male then somersaults to place its abdomen directly above his mate's fangs. That's perfect positioning for the female to begin devouring the male's body.</p></blockquote><p> To avoid being gobbled up by the female halfway through mating, males need to dance for 100 minutes, <a href="http://rspb.royalsocietypublishing.org/content/early/2009/10/23/rspb.2009.1554.abstract?sid=09ba3fa4-07c3-40f0-b3d1-bfc2d1dfa287" title="">according to new research</a>. But the dancing males better have a good internal clock. Females can't determine the source of courtship, so if the dancer exceeds the optimal time, a slick male could sneak in a mate with the female while the dancer ends up alone on the web. For a video of the life-or-death dance, click on over to the <a href="http://dsc.discovery.com/videos/animals-spider-sex-dangerous-for-some.html" title="">Discovery News</a>. Related Content: Discoblog: <a href="/planet-earth/egad-oldest-spider-web-dates-back-to-dinosaur-era" title="">Egad! Oldest Spider Web Dates Back to Dinosaur Era</a> Discoblog: <a href="/planet-earth/female-spiders-attracted-to-ultraviolet-bling" title="">Female Spiders Attracted to Ultraviolet Bling</a> DISCOVER: <a href="/mind/stalking-spiders" title="">Stalking Spiders</a><em>Image: Ken Jones</em></p>

redback-spiders-web.gif

Discover the risky mating dance of male Australian redback spiders, where impressing females can mean life or death.

Planet Earth

So You Think You Can Dance: Spider Edition

Article

News

Brett Israel

Science

If you thought going to the club was bad, imagine having to dance in front of potential mates for over an hour and a half, lest they will eat you. Male Australian redback spiders, members of the black widow family, pay the ultimate price if their mating dance doesn't impress. Here's how it works, via Livescience.com: Males, which are just 1 percent to 2 percent of a female's body weight, dance about the web of a potential mate, plucking at the threads and sending out vibrations. Once the male redback has performed an adequate dance, the female will allow him to mount her and insert one of his two palps, or copulatory organs, into one of a pair of sperm storage organs. The male then somersaults to place its abdomen directly above his mate's fangs. That's perfect positioning for the female to begin devouring the male's body. To avoid being gobbled up by the female halfway through mating, males need to dance for 100 minutes, according to new research. But the dancing males better have a good internal clock. Females can't determine the source of courtship, so if the dancer exceeds the optimal time, a slick male could sneak in a mate with the female while the dancer ends up alone on the web. For a video of the life-or-death dance, click on over to the Discovery News. Related Content: Discoblog: Egad! Oldest Spider Web Dates Back to Dinosaur Era Discoblog: Female Spiders Attracted to Ultraviolet Bling DISCOVER: Stalking SpidersImage: Ken Jones

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