The California Naturalist Handbook provides a fun, science-based introduction to Californias natural history with an emphasis on observation, discovery, communication, stewardship and conservation. It is a hands-on guide to learning about the natural environment of California. Subjects covered include California natural history and geology, native plants and animals, Californias freshwater resources and ecosystems, forest and rangeland resources, conservation biology, and the effects of global warming on Californias natural communities. The Handbook also discusses how to create and use a field notebook, natural resource interpretation, citizen science, and collaborative conservation and serves as the primary text for the California Naturalist Program.