Many climb to the top of a nearby object, produce long filaments of silk (known as gossamer), and are carried by the wind. Young spiders, known as spiderlings, emerge from the eggsac and disperse. Females of some species (wolf spiders, cellar spiders, nurseryweb spiders) may carry the eggsac until the eggs hatch. The eggsac of many webspinning species are found in and around the webs. Most cover the eggs with a sheet of tough silk that can attach to almost any surface. Life Cycleįemales lay eggs in clusters of up to several dozen. These spiders physically overpower their prey and then use venom to immobilize them. Others are active hunters that ambush or capture prey. Some spiders capture prey by using silk and venom. The pattern of eye arrangement is characteristic for the different spider families. On the cephalothorax are usually six to eight eyes, often arranged in two rows. The body regions include the cephalothorax (head and legs) and the abdomen. Spiders differ from insects in that they have eight legs (rather than six) and only two body regions (instead of three). There are a few spiders whose bite requires medical attention. Others object to spiders because of their habit of building webs in and around the home. Many people fear spiders because of stories or myths. However, their presence is a cause of concern to some people. Oftentimes they are the most important biological control of insect pests in gardens, fields, forests, and homes. Spiders are beneficial arthropods, that survive by feeding on insects. Common spiders found indoors include funnel web spiders, cobweb spiders, cellar spiders, and sac spiders.Some spectacular spiders are found in webs outdoors in late summer, particularly the banded argiope and the “catface” spiders.Some spiders wander indoors in the early fall when cooler outdoor temperatures force them to find shelter.This makes them beneficial in helping manage pests. Spiders feed on insects and other arthropods.
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