Siberian chiffchaff 
Siberian rubythroat 
Siberian stonechat 
Sickle-billed vanga 
Sierra Nevada Antpitta 
Sierra Nevada brushfinch 
Sierran elaenia 
Silver Beaked Tanager 
Silver-backed tanager 
Silver-eared Mesia 
Silver-throated tanager 
Silverbird 
Silvered Antbird 
Silvereye 
Sinai rosefinch 
Singing bush lark 
Singing Honeyeater 
Singing Honeyeater 
Singing starling 
Slate-colored antbird 
Slate-colored boubou 
Slate-coloured grosbeak 
Slate-coloured seedeater 
Slate-throated Redstart