A spider web, spiderweb, spider`s web, or cobweb from the archaic word coppe, meaning `spider`[1] is a structure created by a spider out of proteinaceous spider silk extruded from its spinnerets, generally meant to catch its prey.
Spider webs have existed for at least 100 million years, as witnessed in a rare find of Early Cretaceous amber from Sussex, in southern England.[2] Many spiders build webs specifically to trap and catch insects to eat. However, not all spiders catch their prey in webs, and some do not build webs at all. `Spider web` is typically used to refer to a web that is apparently still in use i.e. clean, whereas `cobweb` refers to abandoned i.e. dusty webs.[3] However, the word `cobweb` is also used by biologists to describe the tangled three-dimensional web[4] of some spiders of the family Theridiidae. While this large family is known as the cobweb spiders, they actually have a huge range of web architectures; other names for this spider family include tangle-web spiders and comb-footed spiders.
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進階授權 | 5472 x 3648 px | JPG | 88 點 |
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