- Sanderling
- Sandwich Tern
- Satanic Nightjar
- Savi's Warbler
- Sedge Warbler
- Semipalmated Plover
- Senegal Lapwing
- Sharpe's Longclaw
- Shining Honeycreeper
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Sickle-winged Chat
- Slate-colored Boubou
- Slender-tailed Nightjar
- Snow Bunting
- Snowy Egret
- Somali Bee-eater
- Song Thrush
- Southern Bald Ibis
- Southern Black Flycatcher
- Southern Brown-throated Weaver
- Southern Crested Guineafowl
- Southern Grey-headed Sparrow
- Southern Ground Hornbill
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern Yellow-billed Hornbill
- Spanish Sparrow
- Speckled Mousebird
- Speckled Pigeon
- Spectacled Thrush
- Speke's Weaver
- Spike-heeled Lark
- Spot-billed Pelican
- Spot-flanked Barbet
- Spot-winged Pigeon
- Spotted Eagle-Owl
- Spotted Flycatcher
- Spotted Palm Thrush
- Spotted Thick-knee
- Spur-winged Lapwing
- Squacco Heron
- Square-tailed Drongo
- Square-tailed Nightjar
- Steel-blue Whydah
- Steller's Jay
- Streak-headed Woodcreeper
- Striated Heron
- Sulawesi Myzomela
- Summer Tanager
- Sunbittern
- Sungrebe
- Superb Starling
- Swamp Nightjar
- Syrian Woodpecker