- Saddle-billed Stork
- Sand Martin
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Scarlet-chested Sunbird
- Scopoli's Shearwater
- Secretarybird
- Senegal Coucal
- Seychelles Black Parrot
- Seychelles Blue Pigeon
- Seychelles Bulbul
- Seychelles Fody
- Seychelles Magpie-Robin
- Seychelles Sunbird
- Seychelles Warbler
- Shaft-tailed Whydah
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Slaty Egret
- Sooty Tern
- Southern Black Flycatcher
- Southern Carmine Bee-eater
- Southern Ground Hornbill
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern White-crowned Shrike
- Southern Yellow-billed Hornbill
- Spotless Starling
- Spotted Eagle-Owl
- Spotted Redshank
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Striated Heron
- Striped Kingfisher
- Subalpine Warbler
- Swainson's Spurfowl
- Swallow-tailed Bee-eater
- Swamp Boubou