Ecologic Races of Song Sparrows in the San Francisco Bay Region Joe T. Marshall

Ecologic races of song sparrows in the San Francisco Bay region.--Part I, Habitat and abundance.Part II, Geographical variation.M•SnALL, Jo• T. Condor, 50: 193-215, 233-256, 9 figs., 3 tables, 1948.--TheSan Francisco Bay region in west central California is only about 60 miles long, and little more than half as wide.Yet in this small space four subspecies of song sparrows, Melospiza melodia, occur as residents, three of them restricted to small ranges within this area, and the fourth more widespread.Of the three endemic subspecies, M. m. pusillula occupies the salt marshes of the south arm of the bay; samuelis occupies the salt marshes of the north arm of the bay; and maxillaris occupies the brackish marshes of a northeast extension of the north arm of the bay.The fourth and more widespread subspecies