The Savanna Sparrows 



tiated, occupy during the breeding season the greater part of northern 

 North America and a large but irregularly defined portion of the United 

 States, and the elevated section of central Mexico. This range excludes 

 the southeastern states broadly, as it does also interior southern Cali- 

 fornia and Arizona. Savanna is the darker form from the northeast, 

 breeding north to northern Ungava, and south irregularly through the 

 northern and north central states, and retiring in winter as far as the 

 Gulf or beyond. Alandinus breeds throughout the northwestern quarter 

 of North America to the north coast of Alaska, save for the portions 

 occupied by sandwichensis and brooksi. The latter, recently defined, 

 occupies the Pacific coastal region of Washington and British Columbia, 

 and perhaps of Oregon. Enjoying, as it does, a perpetually mild climate, 

 it is at least partially sedentary. Nevadensis occupies the Great Basin 

 region, broadly, extends north indefinitely to merge with alaudinus, and 

 south, narrowly, to the central tablelands of Mexico. These four forms, 

 with, possibly, sandwichensis proper, should always be thought of together. 

 Along the coast of the Californias a sharper differentiation occurs. 

 A form scattered over the coastal uplands from San Francisco Bay north- 



Taken in Inyo Coitntv Photo bv the Author 



NEST AND EGGS OF NEVADA SAVANNA SPARROW 



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