The Desert Biome - This is a good general desert site.
Living Desert Zoo and Gardens - The Living Desert occupies 1,800 acres of the Colorado Desert, 300 of which are developed as a zoo, botanical garden and natural history museum. This site features detailed fact sheets about desert animals.
Arizona-Sonora Desert Museum—Especially for Kids - Designed for kids, this site features animal fact sheets, games, and a glossary.
Desert USA - This site includes numerous online maps and information about animals, plants, geology, and the peoples and cultures of the American deserts.