The Bay checkerspot butterfly is the subject of a number of conservation programs, both private and public. Some of the more notable projects are headed by the U.S. Fish and Wildlife Service (USFWS) and Stanford University. On September 11, 1984, the USFWS proposed that 8,300 acres (34 km2) in five sites be declared "critical habitat" for the Bay checkerspot. Areas included San Bruno Mountain, Edgewood County Park and its adjacent watershed lands, Redwood City, between the boundary with Woodside, Jasper Ridge and Coyote Ridge in the Morgan Hill zone.
