- Saffron Finch
- Sahel Bush Sparrow
- Sand Martin
- Sanderling
- Sandhill Crane
- Sandwich Tern
- Sardinian Warbler
- Savanna Hawk
- Savi's Warbler
- Sayaca Tanager
- Scaled Dove
- Scaly-breasted Hummingbird
- Scaly-breasted Munia
- Scaly-feathered Weaver
- Scarlet-browed Tanager
- Scarlet-chested Sunbird
- Scarlet-headed Blackbird
- Scarlet-rumped Tanager
- Scarlet-rumped Tanager (costaricensis)
- Scarlet Flycatcher
- Scarlet Macaw
- Scrub Blackbird
- Scrub Tanager
- Sedge Warbler
- Senegal Coucal
- Senegal Parrot
- Senegal Thick-knee
- Seychelles Blue Pigeon
- Seychelles Bulbul
- Seychelles Kestrel
- Seychelles Sunbird
- Shaft-tailed Whydah
- Shining Honeycreeper
- Shiny Cowbird
- Short-eared Owl
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Silver-beaked Tanager
- Silver-throated Tanager
- Silvereye
- Silvery-cheeked Hornbill
- Slate-throated Whitestart
- Slender-billed Gull
- Small-billed Elaenia
- Smew
- Smooth-billed Ani
- Snail Kite
- Snow Bunting
- Snowy Egret
- Sombre Tit
- Song Thrush
- Sooty-headed Bulbul
- Southern Banded Snake Eagle
- Southern Fiscal
- Southern Grey-headed Sparrow
- Southern Lapwing
- Southern Red Bishop
- Southern Rough-winged Swallow
- Southern Screamer
- Southern Yellow-billed Hornbill
- Spanish Sparrow
- Sparkling Violetear
- Speckled Hummingbird
- Speckled Mousebird
- Speckled Pigeon
- Spotted Dove
- Spotted Flycatcher
- Spotted Nutcracker
- Spotted Palm Thrush
- Spotted Redshank
- Spotted Sandpiper
- Spotted Woodcreeper
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Square-tailed Drongo
- Squirrel Cuckoo
- Steppe Eagle
- Stock Dove
- Stout-billed Cinclodes
- Straight-billed Woodcreeper
- Streaked Flycatcher
- Streaked Tuftedcheek
- Striated Heron
- Striped Kingfisher
- Striped Treehunter
- Strong-billed Woodcreeper
- Sudan Golden Sparrow
- Sulphur-bellied Flycatcher
- Summer Tanager
- Sunbittern
- Superb Starling
- Swainson's Flycatcher
- Swainson's Spurfowl
- Swallow-tailed Bee-eater
- Swallow Tanager
- Swan Goose
- Syrian Woodpecker