Cal Thomas’ analogy equating Islam to a slow spreading cancer whipped up a storm amongst the Islamists and their appeasers. We have frequently equated those appeasers to HIV. Like the virus, they weaken our immune system so the Islamists can move in for the kill. Analogies are used to provide insight and clarity. The cancer analogy is useful but imprecise, so we borrowed a better one from Mother Nature, the source of all good analogies.
We are talking, of course, about the relationship between the ichneumonid wasp Hymenoepimecis argyraphaga and the orb-weaving spider Plesiometa argyra. Dr. William G. Eberhard’s paper explaining the parasitic relationship in the Journal of Arachnology is here. Damn Interesting has an excellent summary in Mind-Controlling Wasps and Zombie Spiders.
In the forests of Costa Rica, there lurks a sinister variety of wasp, bent on hijacking the minds of hapless spiders for its own ends. Left unmolested, a variety of orb spider known as “Plesiometa argyra” spends every day of its life carefully reconstructing its perfectly round web, and feasting on the insects unfortunate enough to become snagged upon it. But should one of these spiders fall victim to this as-yet-unnamed species of wasp, the spider is stripped of its free will, and made to spend the last evening of its existence building a protective shelter for the larvae that infect it.
It is a true example of mind control in nature, and though scientists are well aware of the method of infection, they are uncertain exactly how the mind control is accomplished. When a wasp successfully attacks a host spider, the spider is temporarily paralyzed as the wasp lays eggs on the tip of the spider’s abdomen. Once the wasp departs, the spider regains its ability to move, and it continues its daily web construction for the next two weeks as though nothing has changed. Meanwhile, the wasp’s growing larvae cling to the spider’s belly and feed on its juices through a number of small punctures.
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