The State threatened Swainson's Hawk (SWHA) occurs throughout the Central Valley of California in alluvial riparian and annual grassland habitat. It may also nest in oak savannah and in open grasslands containing adequate nesting trees along the western edge of the Central Valley within the coastal range. SWHA nests can also be found within the eastern portions of Contra Costa and Alameda counties in CA in appropriate habitat. Most SWHA are migratory, congregating in large flocks in the fall and leaving the state for wintering grounds in Central and South America.
Banks Featuring this Species
Mountain House Conservation Bank is located in eastern Alameda county, north of Livermore, Ca. The bank consists of 147 acres of grassland, seasonal alkali wetland, perennial wetlands and pond habitat. The property is adjacent to DFG's Byron Conservation Bank and is just north of the Bethany Reservoir, a state managed facility.