---- red-backed, 114 Siskin, 127 _Sitta cæsia_, 99 Skua, Buffon’s, 333 ---- common or great, 330 ---- Richardson’s, 333 Skylark, 174 Smew, 258 Snipe, common, 299 ---- double, 298 ---- great, 298 ---- jack, 300 ---- solitary, 298 ---- summer, 309 Snow-bunting, 153 Snowflake, 152 Snow goose, 227 Snowy owl, 199 Solan goose, 221 Solitary snipe, 298 _Somateria mollissima_, 251 ---- _spectabilis_, 246 Song-thrush, 41 Sooty shearwater, 337 ---- tern, 323 Sparrow-hawk, 206 Sparrow, hedge, 84 ---- house, 132 ---- tree, 133 _Spatula clypeata_, 245 Spinner, 181 Spoonbill, 226 Spotted crake, 277 ---- eagle, 216 ---- flycatcher, 116 ---- redshank, 316 ---- woodpecker, 181 Squacco heron, 226 _Squatarola helvetica_, 286 Starling, 154 Steller’s duck, 246 _Stercorarius catarrhactes_, 330 ---- _crepidatus_, 333 ---- _parasiticus_, 333 ---- _pomatorhinus_, 333 _Sterna cantiaca_, 322 ---- _dougalli_, 320 ---- _fluviatilis_, 319 ---- _macrura_, 317 ---- _minuta_, 320 Stilt, black-winged, 316 Stint, American, 317 ---- little, 302 ---- Temminck’s, 303 Stock-dove, 261 Stonechat, 56 Stone-cracker, 54 Stone-curlew, 282 Stork, black, 226 ---- white, 226 Stormcock, 39 Storm petrel, 334 Stormy petrel, 333 _Strepsilus interpres_, 292 _Strix flammea_, 193 _Sturnus vulgaris_, 154 _Sula bassana_, 221 Summer snipe, 309 ---- teal, 243 Surf-scoter, 246 _Surnia funeria_, 199 ---- _ulula_, 199 Swallow, 118 Swallow-tailed kite, 217 Swan, Bewick’s, 234 ---- mute, 233 ---- Polish, 233 ---- whooper, 234 ---- wild, 234 Swift, 178 ---- black, 179 ---- needle-tailed, 179 ---- white-bellied, 179 _Sylvia atricapilla_, 67 ---- _cinerea_, 64 ---- _curruca_, 66 ---- _hortensis_, 69 ---- _nisoria_, 70 ---- _orphea_, 70 _Syrnium aluco_, 198 _Syrrhaptes paradoxus_, 264 _Tachybaptes fluviatilis_, 344 _Tadorna casarca_, 236 ---- _cornuta_, 235 Tangle-picker, 293 Tawny owl, 198 ---- pipit, 113 Teal, 244 ---- blue-winged, 244 ---- cricket, 243 ---- green-winged, 244 ---- summer, 243 Temminck’s stint, 303 Tengmalm’s owl, 199 Tern, arctic, 317 ---- black, 323 ---- Caspian, 323 ---- common, 319 ---- gull-billed, 323 ---- little, 320 ---- roseate, 320 ---- Sandwich, 322 ---- sooty, 323 ---- whiskered, 323 ---- white-winged black, 323 _Tetrao tetrix_, 273 ---- _urogallus_, 275 Thick-knee, 282 Throstle, 41 Thrush, black-throated, 51 ---- missel, 39 ---- rock, 52 ---- song, 41 ---- White’s, 52