Snipe, Wilson . 74 
Snowflake . 175 
Solitaire, Townsend . 235 
Sparrow, Aleutian Savannah .... 177 
Sparrow, Baird . 178 
Sparrow, Belding . 177 
Sparrow, Bell . 186 
Sparrow, Black-chinned . 183 
Sparrow, Botteri . 187 
Sparrow, Brewer . 182 
Sparrow, Bryant . 177 
Sparrow, California Sage . 187 
Sparrow, Cassin . 187 
Sparrow, Clay-colored . 182 
Sparrow, Desert . 186 
Sparrow, Gambel. 180 
Sparrow, Golden-crowned . 180 
Sparrow, Herrmann Song . 189 
Sparrow, Large-billed . 178 
Sparrow, Leconte . 179 
Sparrow, Lincoln . 100 
Sparrow, Oregon Vesper . 177 
Sparrow, Bufous-crowned . 188 
Sparrow, Rufous-winged . 188 
Sparrow, Rusty Song . 189 
Sparrow, Sage . 187 
Sparrow, San Benito . 178 
Sparrow, Shumagin Fox . 190 
Sparrow, Song . 189 
Sparrow, Thick-billed Fox . 190 
Sparrow, Western Chippy . 181 
Sparrow, Western Grasshopper.... 179 
Sparrow, Western Lark . 179 
Sparrow, Western Savannah . 177 
Sparrow, Western Tree . 181 
Sparrow, Western Vesper . 176 
Sparrow, White-crowned . 180 
Sparrow, Worthen . 182 
Stilt, Black-necked . 75 
Swallow, Bank . 200 
Swallow, Barn . 109 
Swallow, Cliff . 198 
Swallow, Northern Violet Green. . 200 
Swallow, Rough-winged. 201 
