Ohlone West Conservation Bank (Open)
Photo: Robert Fletcher

Ohlone West Conservation Bank (OWCB) occurs within Southern Alameda County and is immediately adjacent to the existing Ohlone Preserve Conservation Bank, owned and managed by Fletcher Conservation Lands. It is contiguous with watershed lands owned by the San Francisco PUC and wilderness preserves of the East Bay Regional Park District. OWCB has been agency-approved and is now open for mitigation needs.

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The OWCB contains habitat that supports Alameda whipsnake, Ca tiger salamander, CA red-legged frogs and Callippe Silverspot butterfly. Service Area Maps are agency-approved.

The Alameda striped racer (AKA Alameda whipsnake) is a long, slender snake with a dark dorsal color, usually black, dark brown or charcoal, and a ventral color of yellow or orange, often including a salmon color along the last portion of the snake's underside. It has yellow stripes along both sides of its body but not on top. It has relatively large eyes and hunts visually, seeking out and capturing lizards by rapid bursts of speed. A member of the racer family, this subspecies of the California racer occurs in Alameda, Contra Costa and parts of Santa Clara counties.

California red-legged frog

The California red-legged frog (CRF) is the largest native ranid frog in California. It breeds in ponds, wetlands and slow-moving streams. It is listed as a federally threatened species by the USFWS. The CRF occurs within numerous habitat types including oak woodland, annual grassland, and riparian and wetland habitat.


The California tiger salamander is a vulnerable amphibian native to Northern California. It breeds in ponds and vernal pools, entering the water with the onset of heavy rains in December and January. Shortly after breeding and depositing eggs, adults leave the pond and disperse to underground burrows where they spend the remainder of the year. Juveniles grow to nearly adult size over the next few months and then disperse to terrestrial burrows in late summer, returning years later to breed as adults. Both aquatic and upland terrestrial habitat is critical to the survival of the species.

The Callippe Silverspot Butterfly was listed as a federally endangered species by the USFWS in 1997. It occurs in the San Francisco Bay area with isolated populations in the East Bay in the Pleasanton/Livermore area. It is dependent on managed annual grasslands supporting host plants including the Johnny Jump ups (Viola penduculata) and coyote mint (Monardella villosa) on which the larvae and adults feed, respectively. It occurs widely across the grasslands of the Ohlone West and Ohlone East Conservation Banks where adults can be seen in breeding display flight and foraging from May through July.