Spiders are predators that control other pests. They have two body parts and eight legs. They produce silk to make webs that become retreats, traps for prey or defense areas against other predators. All spiders extrude up to four types of silk from spinnerets on the tips of their abdomens. One type of silk makes cocoons for their eggs, another is made for lowering themselves, one is for construction of web lines, and another is sticky to entrap prey. There are many types of webs, which are species specific. House spiders make messy webs in hidden areas of the home, such as attics, basements, sheds and barns, most are in corners of rooms and very easy to miss. A black widow spider makes tangled webs, commonly found outside near the ground level of building formations or outdoor furniture. Indoors, their webs may be found in crawl spaces and basements. Orb-weaver spiders make round webs. The spiders name is taken from the round shape of their typical web and are the most common builders of spiral wheel-shaped webs. They are often found in gardens, fields and forests.
Spiders are not not parasitic on humans or animals, nor do they transmit any diseases to humans. They naturally control pest population.