A type of biome that is characterized by climactic extremes. Desert lands are usually dry and hot but they are also prone to sudden flash floods and cold nights. Generally, however, deserts are extremely dry areas that get less than 10 inches of rain each year on average. Deserts are known to be sandy landscapes that support very little life, but in reality deserts often have high biodiversity. They are habitat to various cacti and flowers as well as animals that remain hidden during daylight hours to control body temperature or to limit moisture needs. Desert fauna includes the kangaroo rat, coyote, jack rabbit, and many lizards.