Hi, I'm not sure if you are wondering why or how does it become sticky? The why is because it is used to capture its prey which is its food source. The spider actually is able to walk to its prey through the nonsticky pattern it creates. The prey gets stuck and cannot get out before the spider pierces it with its 'fangs' injecting the toxin that paralyzes the prey. Hope that answers your question.
From what I have read, spiders web possesses its remarkable and varied properties due to two substances. The first is silk, which gives it its strength and durability, and the second is a coating. This coating is thought to be mucin, a protein similar to what is found in human mucus and snot. It is this coating that gives spider webs their "stickiness".
The stickiness of a spider's web depends on two substances. First is a silk-like substance, produced in some special kinds of glands in spider's body and the second one is a glue which is consistently dropped by spider on silk threads during web formation.
Actually, this is the glue which makes web more stretchable and sticky because chemically, this glue is composed of glycoproteinic granules which are very viscous and tensile in nature and this glue's bondage with spider-silk makes the whole thread, even more than 5 times stronger than steel.
When a spider is spinning its web it first fixes the threads running spokewise from the center to the edges. These threads are quite smooth.
When they are in place the spider circles round and round over the spokes, attaching to them a spiral thread on which globules of gummy matter are deposited at tiny intervals. These globules act like birdlime, and make the web so sticky that any fly which strikes it is held fast.
The spider has spinnerets that make the webs. They can make different kinds of web— thick, thin, and some sticky. Most of the silk is not sticky, but some strategically placed strands are. They catch flies—but never catch the spider. Using its mouth the spider oils its feet and then walks on the sticky silk without getting caught.
by Kevin Peter4 years ago
Why don't spiders get stuck on their own web?Almost all insects that go near a spider web get trapped in it. So it must be the sticky substance. But why are spiders spared from it?
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Do spiders spend their whole life in their web, waiting for food?What kind of social life does a spider have? Do they go for little walks? I've had this spider in my basement sink for about 5 days now. For some reason I...
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Why are people afraid of spiders?
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