Several insects spin webs, such as Silk Worms. There are also Embioptera more commonly known as "Web Spinners". Don't be confused by different types of webs like Spiders (which are arachnids) use to catch prey.
The primary reason spiders spin a web is to use as a method of hunting prey. The adhesiveness of the web traps insects and other prey that a spider feeds off of. Some spiders, however, do not spin webs and catch their prey using other means, such as the wolf spider that tends to simply run its prey down.
They are infact just insects. Intelligent insects but i doubt that they would do much anyway. They live to live. Spin webs, wait for prey to fly into the web.
yes
Spiders actually spin two kinds of webs: sticky and nonsticky. The sticky web has an adhesive used to trap insects, the nonsticky web has no adhesive and is used for structural supports and traveling by "wind ballooning".
A long-legged relative of the spider that does not spin a web is a harvestman, also known as a daddy longlegs. These arachnids are classified in the order Opiliones and do not produce silk or build webs. Instead, they are primarily scavengers feeding on small insects and plant material.
Ask a spider
Spiders of both sexes spin webs.
spin a orb
yes
spin web and scary
"its" is a possessive pronoun. "spin" should be "spins".