Why insects are entangled by the spider web , but spider doesnot . Why ?

Answer 1

It has a lot to do with the construction of the web. Spiders are capable of spinning different types of silk for the web that they construct. The radial strands (i.e. the wheels on the spoke), tend to be thicker and less sticky compared to the circular part that goes around and forms the net.

Also the spiders are climbing on the strands using the small hooks on their legs so there is a smaller surface area to stick to the strands. It's the difference of touching duct tape with the tip of your finger nail vs. the entire palm of your hand.

The flying insects tend to get trapped because their flapping wings hit multiple sticky strands while the spider gingerly climbs on them like an upside-down tightrope artist. A spider can in fact get trapped it its own web if the web some how sticks around its fat abdomen, sort of like a kitten playing with a roll of toilet paper.

Answer 2

Spiders have the ability to make different types of silk. Some are for catching prey, while others are support lines, and finally some are not sticky so that the spider can walk about its web without getting stuck. The spider is aware where it put what type of silk in certain parts of its web.

Answer 3

Many people think that, but it's not strictly true. If you took the spider off of its web and threw it into the web again, there's a good chance it would stick. Web-spinning spiders take care not to have the sticky, capture silk come into contact with any part of their bodies except the feet, and if I recall correctly, their feet have a waxy cutical on the contact surface(s) that prevent the sticky globules on the web from sticking. Sort of like us having teflon-coated fingers for handling gum or tar.

Answer 4

the spider has a special substance that prevents them from sticking to their own silk.