A spider web, spiderweb, spider`s web, or cobweb from the archaic word coppe, meaning `spider` 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.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. However, the word `cobweb` is also used by biologists to describe the tangled three-dimensional web 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.
圖片編號:
261791648
拍攝者:
Vivekdevasya
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標準授權 | 480 x 360 px | JPG | 13 點 |
標準授權 | 800 x 600 px | JPG | 15 點 |
標準授權 | 2000 x 1500 px | JPG | 18 點 |
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標準授權 | 3265 x 2449 px | JPG | 22 點 |
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標準授權 | 6517 x 4888 px | TIF | 39 點 |
進階授權 | 4608 x 3456 px | JPG | 88 點 |
進階授權 | 4608 x 3456 px | JPG | 88 點 |
進階授權 | 4608 x 3456 px | JPG | 88 點 |