Siberian Rubythroat (beicki)
Sickle-billed Vanga
Sickle-winged Chat
Sierra Nevada Brush Finch
Silver Pheasant
Silver-beaked Tanager
Silver-breasted Broadbill
Silvereye
Silvery Kingfisher
Singing Starling
Slate-colored Seedeater
Slate-throated Whitestart
Slaty Brush Finch
Slaty-backed Chat-Tyrant
Slaty-backed Forktail
Slaty-breasted Rail
Slaty-crowned Antpitta
Slender-billed Crow
Slender-billed Cuckoo-Dove
Slender-billed Greenbul