The number of Greater Sandhill Cranes (Grus canadensis tabida) breeding in California has greatly decreased since the turn of the century. This subspecies was given “fully protected” status by the California Legislature in 1970. The current breeding range in the state is believed to be restricted to the northeastern plateau region, in Siskiyou, Modoc, Shasta and Lassen counties (Grinnell and Miller 1944, McCaskie and DeBenedictis 1966, Naylor et al. 1954). Carroll D. Littlefield of Malheur National Wildlife Refuge, Oregon, has records of 109 pairs breeding in northeastern California, but was unaware of any nesting south of Lassen Co. (pers. comm.). I observed a small breeding population south of the plateau region in Sierra Valley, Sierra and Plumas counties. This is the southernmost breeding locality for the state.