2(^8 



INDEX. 



Sexual selection, 46. 



Shelldrakes, 92. 



Shrike, Loggerhead, 218, 219. 



Northern, 218. 

 Sialia sialis, 260. 

 Signaling colors, 44. 

 Sitta canadensis, 251. 



carolinensis, 250. 

 Snipe, Wilson's, 104. 

 Snipes, 28, 36, 41, 43, 49, 67. 

 Snowbird, Slate-colored, 192. 



White, 196. 

 Snowflake, 38, 196. 

 Songs of birds, 62. 

 Sora, 100. 

 Sparrow, Chipping, 186. 



English, 184. 



Field, 182. 



Fox, 190. 



House, 174, 184. 



Song, 40, 178. 



Swamp, 180. 



Tree, 193, 194. 



Vesper, 183, 184. 



White-crowned, 190. 



White-throated, 188. 

 Sparrows, 6, 18, 41, 43, 49, 67, 178. 

 Spinus tristis, 198. 

 Spiza americana, 210. 

 Spizella pusilla, 182. 



monticola, 194. 



socialis, 186. 

 Spoonbill, Roseate, 33. 

 Squawk, 96. 

 Stake Driver, 98. 

 Sterna hirundo, 90. 

 Sturnella magna, 174. 

 Summer residents, defined, 53. 

 Sylviida^, 251. 

 Syrnum nebulosum, 130. 

 Swallow, Bank, 212, 214. 



Barn, 212,213, 214. 



Clitf, 212, 213, 214. 



Eave, 214. 



Rough-winged, 215. 



Tree, 212, 213, 215. 

 Swallows, 6, 27, 55, 211. 

 Swan, Trumpeter, 94. 



Swan, Whistling. 94. 

 Swift, Chimney, 146. 

 Swifts, 6, 15, 27, 55, 142. 



Tachycineta bicolor, 215. 

 Tail, the, expression of emotion with, 

 26. 



relation between form of, and flight, 

 25. 



sexual characters in, 25. 



uses of, 25. 

 Tanager, Scarlet, 36, 37, 211. 

 Tanagers, 42, 44, 210. 

 Tanagridae, 210. 

 Teal, Blue- winged, 92. 



Green-winged, 92. 

 Telescope, 56, 57. 

 Tern, Common, 90. 

 Tetraonidae, 110. 

 Thrasher, Brown, 240. 

 Thrush, Brown, 240. 



Hermit, 258. 



Wilson's, 254. 



Wood, 12, 256. 

 Thrushes, 6, 55, 67, 252. 

 Thryothorus ludovicianus, 244. 

 Titmouse, Tufted, 250. 

 Towhee, 44, 204. 

 Transient visitants, defined, 54. 

 Trochilidae, 146. 

 Trochilus colubris, 148. 

 Troglodytes aedon, 240. 



hiemalis, 242. 

 Troglodytidfe, 237. 

 Tubinares, 91. 

 Turdidse, 252. 

 Turdus aonolaschkae pallasii, 258. 



fuscesccns, 254. 



mustelinus, 256. 

 Turkey, 27. 

 Tyrannida?, 149. 

 Tyrannus tyrannus, 150. 



Urinator imber, 86. 

 Urinatoridse, 86. 



Veery, 63, 254. 

 Vireo flavifrons, 222. 



