- Saddle-billed Stork
- Scarlet-rumped Tanager
- Scarlet Ibis
- Scarlet Macaw
- Secretarybird
- Senegal Coucal
- Seychelles Black Parrot
- Seychelles Bulbul
- Seychelles Fody
- Seychelles Magpie-Robin
- Seychelles Sunbird
- Seychelles Warbler
- Shining Honeycreeper
- Short-toed Rock Thrush
- Silver Gull (scopulinus)
- Slaty-tailed Trogon
- Slaty Egret
- Small Ground Finch
- Smew
- Snow Bunting
- Snowy Egret
- Sombre Greenbul
- Sooty Tern
- South African Shelduck
- Southern Boubou
- Southern Double-collared Sunbird
- Southern Fiscal
- Southern Giant Petrel
- Southern Ground Hornbill
- Southern Lapwing
- Southern Masked Weaver
- Southern Pochard
- Southern Royal Albatross
- Southern Screamer
- Southern Yellow-billed Hornbill
- Spanish Sparrow
- Speckled Mousebird
- Speckled Pigeon
- Speckled Tanager
- Spot-billed Pelican
- Spruce Grouse
- Squacco Heron
- Steller's Sea Eagle
- Streaked Flycatcher
- Streaky-headed Seedeater
- Striated Heron
- Striped Kingfisher
- Summer Tanager
- Sunbittern
- Superb Starling
- Swallow-tailed Bee-eater
- Swallow-tailed Gull
- Swallow-tailed Hummingbird
- Swallow Tanager
- Swan Goose