The famous spider from Charlotte's Web is a barn orb-weaver spider, Araneus cavaticus. Orb weaving spiders produce the familiar flat, ornate, circular webs usually associated with spiders. Orbweavers come in many shapes and sizes, but the brightly colored garden orbweavers, Argiope spp., are the largest and best known.
The species is found in many parts of the world and is seen along the southeast coast of the United States and in California. The spiny orb weaver spider lives on the edges of woodlands and shrubby gardens. They frequently live in nurseries as well as citrus groves.
The spiny orb weaving spiders look like plant seeds or thorns hanging in their webs and are easily distinguished from other spiders. The male is smaller (1/16"-1/8") than the female (3/8") and seldom noticed.
Spiny orb weavers do not invade the indoors unless carried in while residing in a potted plant. Spiny orb weavers are not dangerous—they are beneficial animals. They should not be killed, if at all possible.