How Spiders Build Their Webs
WouterSpiders build webs to catch prey, but they also use them to defend themselves against predators. They also use their webs as an alarm system. They can lay eggs in damp, dark, unvisited parts of homes.
Some types of spiders, such as Cyclosa argenteoalba, have vertical orb webs. This type of web has an asymmetric pattern, with a bigger area for the upper part of the web than the lower area. Some spiders make simple, horizontal webs, while others build nets under their bodies.
Orb weavers construct the most appropriate structure with help from light cues. They often use a gravity compass to calculate their best shape.
Spiders will also adjust the size and density of their sticky spiral depending on their surroundings. For example, if the wind is blowing, they will adjust their web to a larger size. This way, they can increase their chances of catching their prey.
Webs are made up of different kinds of silk. Some spiders use sticky thread, which adheres to the object it lands on, but spiders can also “tightrope walk” with their silk thread.
Orb weavers will usually begin by placing a few strands of thread in a “Y” shape. They will then secure the other end of the web on an anchor point. This will ensure that the silk is in the right path for flying insects.
When it is almost finished, the spider replaces the sticky threads with footholds. Depending on the size of the web, spiders can produce more than 100 webs in their lifetime. They have a sharp eye, and they can see well in the dark. They use this information to determine how far they can reach their prey.
