Stolen from the the interweb:
http://www.youtube.com/watch?v=tJbriOpDDAQ
A small parasitic grub attaches itself to a specific kind of spider living in the trees of the rain forest. The spider lives on normally catching it's prey and oblivious to the larva feeding from its back.
During the last two weeks of the spider's life, the grub injects a hormone into the spider that causes the spider to lose its tiny little mind. Instead of a organized normal web, the spider begins to weave a seemingly haphazard web. Once the spider completes this new kind of web, the grub sucks the remaining fluids from the body of the spider.
The spiders lifeless hull is then discarded.
The grub then uses the spider's tangled web to weave it's own cocoon where it metamorphizes into a wasp that will carry on the cycle using the body of some other innocent spider.
What a wonderful example of "intelligent" design!
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