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Understory vegetation is dominated by typical annual grassland species, such as soft chess, ripgut brome, and fiddleneck. Wildlife Blue oak and interior live oak woodlands provide food, shade, shelter, and nesting habitat for many wildlife species in the project area. Many common amphibian and reptile species live in the cool, shady areas beneath oaks, including ensatinas, Gilbert's skinks, gopher snakes, and yellow-bellied racers. Several specialized wildlife species are dependent on oaks. Acorns are an important autumn food source for many species, such as acorn woodpeckers,band-tailed pigeons,western gray squirrels, and black-tailed deer (Verner and Boss 1980). Oak trees and snags provide nesting sites for red-tailed hawks and cavity nesters, such as western bluebirds and American kestrels. - A large concentration of oak snags used by woodpeckers and other cavity nesters for food storage and nests is located in the southern part of the project site. Jones & Stokes Associates biologists observed two large raptor nests in the oak woodlands, one of which had young red-tailed hawks in spring 1990 (Larrouy pers. comm.). Developed Areas Vegetation Turfgrasses, ornamental shrubs and trees, and annual ruderal weeds dominate the r. vegetation on the 4 acres of developed areas (Figure 3). Wildlife Farmhouses, barns, and ornamental plantings are attractive to several common species, including house mice, northern mockingbirds, European starlings, house sparrows, common barn owls, rock doves, and barn and cliff swallows. Ringtails have recently been observed feeding in fruit trees adjacent to one of the residences (Baker pers. comm.). Irrigated Pasture Vegetation Irrigated pasture occurs on the northern portion of the project site occupying - approximately 72 acres (Figure 3). 'Be pastures are used for cattle and horse grazing. Most of the irrigated pastures have been leveled for flood irrigation, and a minor portion of the pastures are irrigated with sprinkler systems. 12