The California Departments of Fish and Game, Parks and Recreation, and Transportation (Caltrans) are collaborating to improve planning information for wildlife connectivity statewide. The results of an inquiry to identify existing information on wildlife corridors in California produced eight data sets covering three parts of California and a single statewide data set. Not all data sets represent the same data gathering and analysis criteria for designating corridors.

The data set groups and their creators are:
Statewide Corridors, by South Coast Wildlands - one data set.
Central California Coast Corridors, by Univ. of California, Davis - one data set.
San Joaquin Valley Corridors, by Endangered Species Recovery Program - three data sets.
San Joaquin Valley Corridors, by Information Center for the Environment - two data sets.
Southern California Corridors, by South Coast Wildlands - one data set.

The data set proposes areas where connectiviy and linkages between isolated habitat on the San Joaquin Valley floor and natural lands in the surrounding foothills should be promoted. The information was put together by the Endangered Species Recovery Program and incorporated with the federal recovery plan produced by the U.S. Fish and Wildlife Service.

Reference:
U.S. Fish and Wildlife Service. 1998. Recovery plan for upland species of the San Joaquin Valley, California . Region 1, Portland, OR. 319 pp.