The Migration of North American Sparrows 



TWENTY-FIRST PAPER 

 Compiled by Professor W. W. Cooke, Chiefly from Data in the Biological Survey 



With drawings by Louis Agassiz Fuertes 

 (See Frontispiece) 



FOX SPARROW 



In the eastern United States, the Fox Sparrow winters from the valleys 

 of the Potomac and Ohio Rivers to the Gulf States; it breeds throughout the 

 larger part of Canada. The birds of the region from the Rocky Mountains 

 to the Pacific have been separated into seven subspecies. Some of these forms, 

 breeding from California to Colorado, are almost non-migratory, making 

 short journeys from the mountains where they nest to the warmer valleys 



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ISOCHRONAL MIGRATION LINES OF THE FOX SPARROW 

 (104) 



