Cobweb-turned-slingshot hunting has new tricks
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Last Update: 2021-02-01
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Source: Internet
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Author: User
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spiders use their bodies as bridges between anchor lines and cobwebs.about how spiders hunt, people often think of intricate webs that trap passing insects. But the triangular web spider, native to the United States and Canada, is very special: it makes a slingshot out of cobwebs, uses it to ejaculation itself forward and captures its prey.
to see how triangular web spiders hunt, scientists recorded their activity in high-speed video. They found that spiders stretch and tighten spiders, use their bodies as bridges between anchors and cobwebs, and can withstand the tension of cobwebs for hours on end. When prey strays into the cobwebs, spiders release fulcers of spider silk, using the energy stored by the spiders to shoot forward at super-high speeds, after which the cobwebs surround the prey in all directions to prevent the prey from escaping, scientists report in the Proceedings of the National Academy of Sciences on May 13.
the only known example of spider-shaped animals using devices to enhance their abilities, according to researchers. The study also reveals a new function of spider silk
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