Shorebird studies in the Central Valley of California have been limited even though the status and ecology of shorebirds along the coast of central California have been well studied (Storer 1951, Recher 1966, Page 1973). Consequently, many of the conclusions regarding shorebirds in central California have been based on information from coastal localities (Grinnell et al. 1918, Grinnell and Miller 1944, McCaskie and DeBenedictis 1966). In recent years, however, shorebird migration in the Sacramento Valley (Figure 1) has come under increased observation. Censuses at the Spreckles Sugar Company settling ponds near Woodland, Yolo County, and at the Sacramento National Wildlife Refuge, Glenn County, have been included in statewide shorebird surveys of the California Department of Fish and Game (Jurek 1973).