- Saddle-billed Stork
- Sand Martin
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Scaly-feathered Weaver
- Scarlet-chested Sunbird
- Scopoli's Shearwater
- Secretarybird
- Sharp-tailed Ibis
- Shoebill
- Short-eared Owl
- Short-toed Rock Thrush
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Siberian Jay
- Siberian Stonechat
- Silverbird
- Silvery-cheeked Hornbill
- Sirkeer Malkoha
- Slender-billed Gull
- Snow Bunting
- Snowy Egret
- Somali Crow
- Somali Ostrich
- Song Thrush
- Sooty Chat
- South African Shelduck
- Southern Black Flycatcher
- Southern Brown-throated Weaver
- Southern Carmine Bee-eater
- Southern Fiscal
- Southern Grey-headed Sparrow
- Southern Ground Hornbill
- Southern Lapwing
- Southern Masked Weaver
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern Red Bishop
- Southern White-crowned Shrike
- Southern Yellow-billed Hornbill
- Spanish Sparrow
- Speckled Mousebird
- Speckled Pigeon
- Spectacled Warbler
- Speke's Weaver
- Spike-heeled Lark
- Spot-breasted Lapwing
- Spotless Starling
- Spotted Eagle-Owl
- Spotted Flycatcher
- Spotted Owlet
- Spotted Palm Thrush
- Spotted Redshank
- Spotted Thick-knee
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Steel-blue Whydah
- Steppe Eagle
- Stock Dove
- Stout Cisticola
- Straw-tailed Whydah
- Streaky Seedeater
- Striated Heron
- Superb Starling
- Swainson's Sparrow
- Swallow-tailed Bee-eater
- Swamp Flycatcher