There are many species in California and they vary in color from dull brown or yellow to bright green, but most have a yellow longitudinal stripe on the back. A number of predatory mites feed on spider mites, frequently keeping them at tolerable levels. Predatory mites can be distinguished from the plant-feeding spider mites by the absence of the two spots on either side of the body, their pear shape, and their more active habits. Compared to the plant-feeding species of mites that remain in one location feeding, predatory mites move rapidly around the leaf looking for prey. Because they are so small, a hand lens is helpful in viewing them.
All spiders are predators and many contribute significantly to biological control.
Many types of spiders including crab spiders, jumping spiders, cobweb spiders, and the orb-weavers occur in landscapes. Pests of Landscape Trees and Shrubs. Flint, M. L., and S. H. Dreistadt. Natural Enemies Handbook. Karlik, J., P. B. Goodell, and G. W. Osteen.