Monday 21 October 2019
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Spider webs seemingly appear over night this time of year

This question comes up every autumn, so it’s apparently worth the revisit. They seem to appear overnight: spider webs stretched over paths and trails where there were none before -- often with huge spiders poised upside down in the center. Most conspicuous webs people notice are “orb” webs, the stereotype classic spider-web shape that span open spaces. Only two groups of spiders weave orb Oregon has a couple of native species and at least one introduced species of orb web weavers. Up to five times stronger than steel, spider silk is a water-proof protein. The silk is extruded as a liquid through four to seven nozzle-like spinnerets at the far end of the spider’s abdomen. Each spinneret...

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