Siberian Stonechat
Sickle-billed Vanga
Sickle-winged Chat
Sierra Nevada Brushfinch
Sikkim Treecreeper
Silver Gull
Silver Gull (scopulinus)
Silver Pheasant
Silver-beaked Tanager
Silver-breasted Broadbill
Silvereye
Singing Honeyeater
Singing Starling
Slate-colored Seedeater
Slate-throated Whitestart
Slaty Brushfinch