- Sand Martin
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Savannah Sparrow
- Savi's Warbler
- Scaly-breasted Munia
- Sedge Warbler
- Semicollared Flycatcher
- Senegal Coucal
- Senegal Eremomela
- Senegal Parrot
- Senegal Thick-knee
- Seychelles Black Parrot
- Seychelles Blue Pigeon
- Seychelles Bulbul
- Seychelles Kestrel
- Seychelles Paradise Flycatcher
- Seychelles Sunbird
- Shiny Cowbird
- Short-toed Snake Eagle
- Siamese Pied Myna
- Silver-eared Mesia
- Silver Pheasant
- Slender-billed Gull
- Smooth-billed Ani
- Snowy Egret
- Sombre Tit
- Song Sparrow
- Song Thrush
- Spanish Sparrow
- Speckled Mousebird
- Speckled Pigeon
- Splendid Sunbird
- Spotless Starling
- Spotted Dove
- Spotted Flycatcher
- Spur-winged Lapwing
- Squacco Heron
- Stock Dove
- Streak-eared Bulbul
- Striated Heron
- Summer Tanager
- Swan Goose
- Syrian Woodpecker