- Sabota Lark
- Saddle-billed Stork
- Saffron-crowned Tanager
- Saffron Finch
- Sahel Bush Sparrow
- Sahel Paradise Whydah
- Sand Martin
- Sanderling
- Sandhill Crane
- Sandwich Tern
- Santa Marta Antbird
- Santa Marta Antpitta
- Santa Marta Brushfinch
- Santa Marta Foliage-gleaner
- Santa Marta Mountain Tanager
- Santa Marta Warbler
- Santa Marta Woodstar
- Sardinian Warbler
- Saunders's Tern
- Savannah Sparrow
- Savi's Warbler
- Scale-crested Pygmy Tyrant
- Scaled Dove
- Scaled Piculet
- Scaled Pigeon
- Scaly-breasted Hummingbird
- Scaly-breasted Munia
- Scaly-throated Honeyguide
- Scarlet-backed Flowerpecker
- Scarlet-bellied Mountain Tanager
- Scarlet-chested Sunbird
- Scarlet-fronted Parakeet
- Scarlet-rumped Tanager
- Scarlet Macaw
- Scintillant Hummingbird
- Scissor-tailed Kite
- Scopoli's Shearwater
- Scrub Euphonia
- Scrub Tanager
- Secretarybird
- Sedge Warbler
- Semipalmated Plover
- Semipalmated Sandpiper
- Semiplumbeous Hawk
- Senegal Coucal
- Senegal Eremomela
- Senegal Lapwing
- Senegal Thick-knee
- Sentinel Rock Thrush
- Sharpe's Starling
- Shelley's Starling
- Shikra
- Shining Drongo
- Shining Sunbeam
- Shiny Cowbird
- Shoebill
- Short-billed Dowitcher
- Short-eared Owl
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Shy Albatross
- Siamese Pied Myna
- Siberian Blue Robin
- Sickle-winged Guan
- Sierra Nevada Antpitta
- Sierra Nevada Brushfinch
- Silver-backed Tanager
- Silver-beaked Tanager
- Silver-eared Mesia
- Silver-throated Tanager
- Silverbird
- Silvery-cheeked Hornbill
- Silvery Grebe
- Simple Greenbul
- Singing Cisticola
- Slate-colored Boubou
- Slate-throated Whitestart
- Slaty-backed Forktail
- Slaty-backed Nightingale-Thrush
- Slaty-capped Flycatcher
- Slaty-crowned Antpitta
- Slaty Brushfinch
- Slaty Flowerpiercer
- Slender-billed Greenbul
- Slender-billed Gull
- Slender-billed Weaver
- Slender-tailed Nightjar
- Smew
- Smoky-brown Woodpecker
- Smooth-billed Ani
- Snow Bunting
- Snow Goose
- Snowy-crowned Robin-Chat
- Snowy Egret
- Sociable Weaver
- Social Flycatcher
- Socotra Cormorant
- Solitary Sandpiper
- Somali Bunting
- Somali Crow
- Somali Fiscal
- Somali Ostrich
- Sombre Greenbul
- Song Sparrow
- Song Thrush
- Sooty-capped Chlorospingus
- Sooty-faced Finch
- Sooty-headed Bulbul
- Sooty Chat
- Sooty Gull
- Sooty Shearwater
- Sooty Thrush
- South African Cliff Swallow
- South African Shelduck
- Southern Bald Ibis
- Southern Black Flycatcher
- Southern Black Korhaan
- Southern Boubou
- Southern Crested Guineafowl
- Southern Double-collared Sunbird
- Southern Fiscal
- Southern Grey-headed Sparrow
- Southern House Wren
- Southern Lapwing
- Southern Masked Weaver
- Southern Red-billed Hornbill
- Southern Red Bishop
- Southern Yellow-billed Hornbill
- Spangle-cheeked Tanager
- Spanish Imperial Eagle
- Spanish Sparrow
- Sparkling Violetear
- Speckle-breasted Woodpecker
- Speckle-fronted Weaver
- Speckled Chachalaca
- Speckled Hummingbird
- Speckled Mousebird
- Speckled Pigeon
- Speckled Tinkerbird
- Spectacled Warbler
- Spectacled Weaver
- Speke's Weaver
- Spike-heeled Lark
- Spot-billed Pelican
- Spot-breasted Lapwing
- Spot-flanked Barbet
- Spot-flanked Gallinule
- Spotless Starling
- Spotted Antbird
- Spotted Crake
- Spotted Dove
- Spotted Flycatcher
- Spotted Palm Thrush
- Spotted Redshank
- Spotted Sandpiper
- Spotted Thick-knee
- Spotted Woodcreeper
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Square-tailed Drongo-Cuckoo
- Squirrel Cuckoo
- Steely-vented Hummingbird
- Steppe Eagle
- Stilt Sandpiper
- Stork-billed Kingfisher
- Stout Cisticola
- Straw-headed Bulbul
- Straw-tailed Whydah
- Streak-backed Oriole
- Streak-crowned Antvireo
- Streak-eared Bulbul
- Streak-headed Woodcreeper
- Streak-throated Canastero
- Streaked Flycatcher
- Streaked Saltator
- Streaked Scrub Warbler
- Streaked Spiderhunter
- Streaked Wren-Babbler
- Streaked Xenops
- Streaky-headed Seedeater
- Streaky Seedeater
- Stresemann's Bushcrow
- Striated Grassbird
- Striated Heron
- Striolated Bunting
- Stripe-headed Sparrow
- Stripe-tailed Hummingbird
- Stripe-throated Bulbul
- Striped Kingfisher
- Sudan Golden Sparrow
- Sulphur-rumped Myiobius
- Sultan Tit
- Summer Tanager
- Sunbittern
- Sunda Brush Cuckoo
- Sunda Pygmy Woodpecker
- Sungrebe
- Superb Starling
- Superciliaried Hemispingus
- Swainson's Sparrow
- Swainson's Spurfowl
- Swainson's Thrush
- Swallow-tailed Bee-eater
- Swallow-tailed Hummingbird
- Swallow Tanager
- Swamp Flycatcher
- Swan Goose
- Swee Waxbill
- Sword-billed Hummingbird