FACING PAGE 



Sierra Junco (Color-plate) ■ 290 



A Warm Day in the Yosemite (Duotone) 302 



Gambel's Sparrow on Log (Duotone) 330 



Song Sparrow Group (Color-plate) 344 



Lincoln's Sparrow (Color-plate) 358 



Lincoln's Cathedral (Photogravure) 364 



A Selection of Fox Sparrows (Color-plate) 366 



Slate-colored Sparrow at Nest (Photogravure) 374 



Green-tailed Towhee (Color-plate) 386 



N/4 San Diego Towhee (Duotone) 394 



Abert's Towhee (Color-plate) 398 



Lazuli Bunting (Color-plate) 410 



Western Blue Grosbeak (Color-plate) 414 



Black-headed Grosbeak Feeding Young (Duotone) 418 



Cooper and Western Tanagers (Color-plate) 430 



Group of California Warblers (Color-plate) 442 



Dusky Warbler (Color-plate) 446 



Nest and Eggs of Dusky Warbler (Photogravure) 450 



A Rugged Asylum (Photogravure) 468 



Audubon's Warbler (Color-plate) 472 



Olancha Peak and the Cottonwood Lakes (Duotone) 474 



Townsend's Warbler (Color-plate) 484 



Hermit Warbler (Color-plate) 490 



Tolmie's Warbler (Color-plate) 496 



Alaska Water-thrush (Color-plate) 502 



Tule Yellow-throat (Color-plate) 506 



Golden Warbler (Color-plate) 514 



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