The California Native Plant Society (CNPS) is a statewide non-profit organization of amateurs and professionals with a common interest in California's native plants. The Society, working through its local chapters, seeks to increase understanding of California's native flora and to preserve this rich resource for future generations.

The California Lichen Society seeks to promote the appreciation, conservation, and study of the lichens. The focus of the Society is on California, but its interests include the entire western part of the continent.

The Mission of the California Native Grasslands Association is to develop, promote, preserve and restore native grasses and grassland ecosystems of California.

The California Botanical Society was founded by Willis Linn Jepson in 1915 and has served a major role in advancing western American botany. Since 1915, the Society has published the peer-reviewed, scientific journal Madroño.

Founded in 1988, the California Oak Foundation (COF) is a non-profit educational organization committed to preserving the state's oak forest ecosystem and its rural landscapes.

Southern California Botanists is an organization of individuals devoted to the study, preservation, and conservation of the native plants and plant communities of Southern California.

The California Weed Science Society (CWSS) aims to promote environmentally sound proactive research and develop educational programs in weed science.

The California Oak Mortality Task Force (COMTF) focuses on the plant pathogen Phytophthora ramorum, which can have devastating effects in the wildlands it inhabits and has had substantial impacts on the nursery industry internationally.

Protecting California's Wildlands from Invasive Plants Through Research, Restoration, and Education. Cal-IPC proposes and facilitates solutions to such problems caused by invasive plants

The Santa Cruz Bird Club was founded in 1956. The Club sponsors birding walks in and around the county of Santa Cruz, boat trips on Monterey Bay, summer picnics and annual dinners, meetings September through May featuring informative, illustrated talks for birders on wild birds and related topics.

The mission of the Golden Gate Raptor Observatory is to study migrating birds of prey along the Pacific coast and to promote public awareness of the state of raptor populations. The GGRO is a project of the Golden Gate National Parks Association and the National Park Service.

Founded in 1965 as Point Reyes Bird Observatory, PRBO Conservation Science is dedicated to conserving birds, other wildlife and ecosystems through innovative scientific research and outreach.

The San Francisco Bay Bird Observatory is a not-for-profit organization dedicated to the conservation of birds and their habitats through research, monitoring and educational activities.

The Golden Gate Audubon Society

The mission of the Santa Clara Valley Audubon Society is to preserve, to enjoy, to restore and to foster public awareness of native birds and their ecosystems, mainly in Santa Clara County.

The mission of VWS is to perpetuate plant and animal species native to the central coast of California through wildlife and habitat restoration, research and education.
VWS created the Big Sur Ornithology Lab to monitor the populations of the hundreds of species of migratory birds using Andrew Molera State Park

The Southern California Association of Marine Invertebrate Taxonomists was formed with the goal of promoting the study of marine invertebrate taxonomy in southern California and developing a regionally standardized taxonomy.

The California Bat Conservation Fund is a non-profit organization dedicated to the preservation of bats. The Fund's major activities include presentations, restoring injured and orphaned bats to health and returning them to the wild and working alongside major conservation efforts to replenish shrinking bat populations.

The Pacific Coast Entomological Society is an organization devoted to western entomology in all its aspects. The society was organized on 15 August 1901, and filed Articles of Incorporation in the State of California on 28 August 1940, thus establishing itself as a nonprofit corporation.

California Turtle and Tortoise Club (CTTC) was founded in 1964 and has over 2,800 members world-wide.

The San Diego Turtle and Tortoise Society is a non-profit California Corporation comprised of individuals sharing a common interest in chelonians and is dedicated to the preservation of existing wild populations along with a better understanding and knowledge of care for those animals already in captivity.

The Mycological Society of San Francisco is a non-profit corporation formed in 1950 to promote the study and exchange of information about mushrooms.

The Sonoma County Mycological Association organizes forays, lectures and more, with monthly meetings in Santa Rosa.

The Fungus Federation of Santa Cruz (FFSC) is an informal affiliation of fungophiles dedicated to the knowledge, pursuit and appreciation of wild mushrooms.

LAMS is a non-profit group whose purpose is to foster and expand the understanding and appreciation of mycology (that is the study of mushrooms and fungi).

The San Diego Mycological Society was established in 1997. We are interested in mushrooms for a variety of reasons: culinary, cultivation, identification, photography, ecology, and more. We conduct classes, lead forays, and assist in mushroom identification.

The mission of the San Diego Natural History Museum is to interpret the natural world through research, education and exhibits; to promote understanding of the evolution and diversity of southern California and the peninsula of Baja California; and to inspire in all a respect for nature and the environment.

As one of the 10 largest natural history museums in the world, the California Academy of Sciences Natural History Museum brings the message of research to nearly one and a half million visitors each year.

Founded in 1853 as the first scientific institution in the West, the California Academy of Sciences' mission is to explore and explain the natural world. The Steinhart Aquarium was opened in 1923.

Founded in 1955, Lindsay Wildlife Museum operates the oldest and one of the largest wildlife rehabilitation hospitals in the United States, treating more than 6,000 injured and orphaned wild animals each year.

The mission of the Natural History Museum of Los Angeles County is to inspire wonder, discovery and responsibility for our natural and cultural worlds.

The mission of Santa Barbara Natural History Museum is to enlighten the public by developing and presenting knowledge of natural history research, so as to teach and inspire a lifelong passion and abiding respect for the natural world.

Quail Botanical Gardens is dedicated to the conservation of rare and endangered plants from across the globe. San Diego visitors and residents are invited to experience this spectacular collection of flora.

South Coast Botanic Garden

Virginia Robinson Gardens

Descanso Gardens

Arboretum of Los Angeles