Spiders can be found in all environments throughout the entire world, except in the air and sea. Biology of Spiders, R.Foelix These invertebrates of the order Aranea are one of the several groups of the Class Arachnida, with about thirty four thousand species. They range in body size from only a few millimeters in length to almost five inches. All are carniverous and have four pair of walking legs, one pair of pedipalps, and one pair of chelicerae. Spiders, W.Shear Each chelicerae consists of a base and a fang. The fang folds up inside of a groove in the...
their bites are only painful to humans, not deadly. Biology of Spiders, R.Foelix

Though feeding habits vary with spiders their methods of reproduction are all relatively similar, though each species has its own specific ritual. Because spiders are cannabilistic, the much smaller male must be very cautious in approaching a potential mate. If he simply rushes in towards the female, the chances are that he will be seen only as food and consumed. So spider courtship has evolved into a special complex pattern that varies in each species. This variation allows for species recognition, so no gametes are was