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California IBA Contact

Andrea Jones

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California IBAs by Type

IBA Priority Number Acres
Global 82 13,954,543
State 95 5,757,316
Total 177 19,711,859

California's Important Bird Areas Program, launched in 1996, surged forward in 2000. Beginning in 2001, dozens of California field ornithologists, representing a broad range of agencies and affiliations, were interviewed and questioned about sites significant to bird populations in the state. These interviews, in combination with collecting data from around the state, and review by a technical committee, led to 145 sites becoming designated as Important Bird Areas. In 2004, Audubon published the book "Important Bird Areas of California" by Daniel S. Cooper. This network of IBAs is the cornerstone of Audubon's conservation activities in California. Their identification is guiding conservation at the chapter, state, and national levels of Audubon, and serves to showcase noteworthy habitat to other interested groups and agencies. In 2006, Audubon California prioritized IBAs based on bird value, degree of threat, and availability of conservation opportunities, and works with local chapters to conserve these sites and to develop systems to monitor their bird life. 

Audubon California has partnered with Cornell Lab of Ornithology and Point Blue Conservation Science to develop California eBird (https://ebird.org/region/US-CA) to gather bird abundance and distribution data at IBA sites into an online database. To assist with local planning efforts, Audubon California has developed maps of all IBA sites in California with the assistance of California Polytechnic Institute. We used ArcGIS to map sites and conduct analyses on habitat types, protection status, size, and other factors of interest. Visit our website to learn more about our program: http://ca.audubon.org/!
Text for California IBAs excerpted from "Important Bird Areas of California". Citation: Cooper, D.S. 2004. Important Bird Areas of California. Audubon California. 286 pp. Available (online) at: http://iba.audubon.org/iba/stateIndex.do?state=US-CA . Retrieved (insert date). 
Site Name Status Prioritysort ascending Counties IBA Criteria
Upper Pajaro River (Bolsa de San Felipe) Recognized State San Benito, Santa Clara D1, D4i
Brooks Island Recognized State Contra Costa D5
Concord Marshes Recognized State Contra Costa D1, D4i, D4ii
Corte Madera Marshes Recognized State Marin D4i, D4v
Mount Hamilton Range (East Diablo Range) Recognized State Alameda, San Joaquin, Santa Clara, Stanislaus D1
Eastshore Wetlands Recognized State Alameda, Contra Costa D4i, D4ii, D4v
Elkhorn Slough Recognized State Monterey D1, D4i, D4ii, D4v
Lopez Lake Area Recognized State San Luis Obispo D1
Morro Bay Recognized State San Luis Obispo D1, D4i, D4ii, D4v
North Richmond Wetlands Recognized State Contra Costa D4i, D4ii, D4v
Salinas River - Lower Recognized State Monterey D1, D4ii
San Francisco Bay - South Recognized State Alameda, San Mateo, Santa Clara D1, D4i, D4ii, D4v, D5
Santa Margarita Valley Recognized State San Luis Obispo D1
Santa Maria River Valley Recognized State San Luis Obispo, Santa Barbara D4i
Santa Ynez River Valley Recognized State Santa Barbara D1, D4i
Santa Ynez River - Upper Recognized State Santa Barbara, Ventura D1, D4i, D4ii
Tomales Bay Recognized State Marin D4i, D4ii, D4v, D5
Vandenberg Air Force Base and Santa Ynez Estuary Recognized State Santa Barbara D1, D4i
Buena Vista Lake Bed Recognized State Kern D1
Cosumnes River Watershed - Lower Recognized State Sacramento, San Joaquin D1, D4i, D4ii


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