Spiders belong to arthropods. The body of a spider is divided into a head, chest, and abdomen, which are connected by a slender ventral stalk; The head has a pair of claws in front of the head, and the end of the claws is the venomous teeth of the venom gland duct; There are four pairs of feet on both sides of the chest, with hard claws at the tips of the feet; Spiders have single eyes, as well as eight eyes, six eyes, and four eyes. Wang Anshi's "Zishuo" records that a web was set up on one side, and when an object touched it, it was executed, hence the name "Spider". Spiders are distributed throughout China, mostly inhabiting eaves, corners of walls, and between trees, forming wheel shaped webs. Spiders have a diverse diet, mainly feeding on insects such as flies. They are tolerant to hunger, have strong reproductive ability, and have a long lifespan.

One of the most famous venomous spiders in the world of homeless spiders, living on the Pacific coast in the northwest. The homeless spider is also a type of funnel web spider, but it needs to be distinguished from the Australian funnel web spider. The medical understanding of its bite is still shallow and there is some debate. Spider individuals weave a funnel-shaped filamentous web and wait inside the web for insects to collide with it before hunting. Stray spiders sometimes nest in and around human settlements.