The breeding biology of the Savannah sparrow, Passerculus sandwichensis (Gmelin), at Saskatoon, Saskatchewan
Lein, Millerd Ross
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The Savannah Sparrow, Passerculus sandwichensi (Gmelin), is one of the most widely distributed of all the Nearctic Emberizinae. Its breeding range (A. O. U. checklist, 1957) extends from the tundra of northern Alaska, Yukon, Mackenzie and Keewatin, south across the width of the continent to the Mexican provinces of Sinaloa and Oaxoca, and Guatemala. Sixteen geographic races are recognized in North America (A. O. U. Checklist, 1957). The race concerned in the present study is the Nevada Savannah Sparrow, P. s nevadensis Grinnell.