There is even a spider that knocks at the door of another spider's home and waits for acknowledgement before entering. Spiders belong to the class Arachnida. Horseshoe crabs are their nearest relatives, along with ticks, scorpions, and mites. Many people think spiders are insects, but spiders have eight legs instead of six, and they never have sings. There have been about 35,000 named spiders in the world to date with about two to three times that many waiting to be discovered.
Spiders have a unique craft known as spinning - more precisely, spinning silk.
This silk has many uses, but the best known is for their webs. A spider's web is probably its most remarkable achievement, and they usually like to spin webs at night. The webs can be very strong, and some, like the giant wood spider's web, have been known to snare birds and bats, and can even resist a person walking through them. In New Guinea, there is a small spider that weaves a web about six feet in diameter. The natives set up long bamboo poles at the thickest part of the web, and by the next day the spider have woven its web around the bamboo.