Spiders are not insects. Spiders belong to arachnida. There are many kinds of spiders. There are more than 40,000 kinds of spiders in nature.

Spiders have both advantages and disadvantages for human beings, but as far as they are concerned, they are mainly beneficial insects. Spiders are natural enemies of many agricultural and forestry pests and play an important role in biological control. Protecting and utilizing spiders has become an important part of biological control.

Spiders can be roughly divided into three types: safari spiders, spider webs and cave spiders. The first kind will forage everywhere, and the second kind will wait for rabbits after weaving a net. Most people keep the third kind as pets: cave spiders. They like to hide in sand or holes and make a net at the hole. The net itself is not sticky, and it is purely used to sense the size of prey and hunt.

How many eyes does a spider have?

Most spiders have eight eyes.

Spiders' eyes are in front of their heads. Most spiders have eight eyes of different sizes, some have six eyes, a few have no eyes, or have two, four or 12 eyes. Although spiders have many eyes, their eyesight is average, and what they see is always blurred.