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All spiders make webs.


A web is not just anything a spider makes out of silk; it is a silk structure made to catch prey. Only about half of the known spider species catch prey by means of webs. Others actively hunt for prey (including members of the wolf spider, jumping spider, ground spider, sac spider, lynx spider, and other spider families), or sit and wait for prey to come to them (trap door spiders, crab spiders, and others). Hunting spiders use their silk for the dragline (the single thread all spiders leave behind them when they walk), the egg sac, and in some species, the retreat (a little silk "house" the spider rests in), but do not make true webs.

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