Few build webs. The females carry the egg sac and when the young hatch, they are carried on the female's back for a few days. Common household spiders are the cobweb spiders and yellow house spiders. Cobweb spiders construct webs in corners and areas of little traffic such as basements. They trap all manner of insects that may invade homes.
Yellow spiders make much smaller webs and hunt along window sills.
These arachnids have a small oval body and extremely long legs. They feed on plant juices and dead insects. These spiders are feared because of their size and formidable appearance. Actually they are sluggish spiders and will attack only when they are harmed or cornered. Many are kept for pets.