Most small spiders live for one or two seasons (some of them live over winter as eggs). About 100 species live in the average garden, and about a dozen species live in the average house. The web is liquid silk which hardens as it is dries and stretches. Spun from six different glands is comes in varying thickness and stickiness and is the strongest material made by any invertebrate. To make sure the spider isn't trapped in the cobweb it coats its legs with an oily substance from its mouth.