- Saddle-billed Stork
- Sanderling
- Sandhill Crane
- Sandwich Tern
- Sardinian Warbler
- Sargasso Shearwater
- Savi's Warbler
- Scaly-breasted Munia
- Sedge Warbler
- Sharp-tailed Sandpiper
- Shelley's Francolin
- Short-eared Owl
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Siberian Blue Robin
- Silver-throated Tanager
- Silvery Grebe
- Slaty-backed Gull
- Slaty-legged Crake
- Small Minivet
- Smew
- Snow Bunting
- Soft-plumaged Petrel
- Sombre Tit
- Song Sparrow
- Song Thrush
- Sooty-headed Bulbul
- Southern Black Korhaan
- Southern Boubou
- Southern Double-collared Sunbird
- Southern Ground Hornbill
- Southern Masked Weaver
- Southern Red Bishop
- Southern White-crowned Shrike
- Spangled Drongo
- Spanish Imperial Eagle
- Spanish Sparrow
- Speckled Mousebird
- Spectacled Guillemot
- Spoon-billed Sandpiper
- Spotless Starling
- Spotted Crake
- Spotted Eagle-Owl
- Spotted Flycatcher
- Spotted Owlet
- Spotted Redshank
- Spotted Thick-knee
- Spruce Grouse
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Steller's Sea Eagle
- Stock Dove
- Stout-billed Cinclodes
- Stripe-throated Bulbul
- Striped Kingfisher
- Sultan Tit
- Swallow-tailed Gull
- Swee Waxbill
- Sword-billed Hummingbird