- Sabota Lark
- Sacred Kingfisher
- Saddle-billed Stork
- Saffron-crowned Tanager
- Saffron Finch
- Sand Martin
- Sanderling
- Sandhill Crane
- Sandwich Tern
- Sapphire-vented Puffleg
- Savanna Hawk
- Savi's Warbler
- Saxaul Sparrow
- Scaled Dove
- Scaly-breasted Munia
- Scaly-feathered Weaver
- Scaly Francolin
- Scarlet-backed Flowerpecker
- Scarlet-chested Sunbird
- Scarlet-faced Liocichla
- Scarlet Ibis
- Scarlet Macaw
- Scarlet Minivet
- Schalow's Turaco
- Scissor-tailed Kite
- Secretarybird
- Sedge Warbler
- Semicollared Puffbird
- Semipalmated Plover
- Senegal Coucal
- Senegal Eremomela
- Senegal Lapwing
- Senegal Thick-knee
- Shaft-tailed Whydah
- Sharp-tailed Ibis
- Shikra
- Short-billed Minivet
- Short-eared Owl
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Siamese Fireback
- Siberian Blue Robin
- Siberian Rubythroat
- Siberian Stonechat
- Sickle-winged Guan
- Silver-beaked Tanager
- Silver-breasted Broadbill
- Silver-eared Laughingthrush
- Silver-eared Mesia
- Silver-throated Tanager
- Silver Pheasant
- Silverbird
- Silvery-cheeked Hornbill
- Slate-colored Boubou
- Slate-throated Whitestart
- Slaty-backed Flycatcher
- Slaty Egret
- Slender-billed Crow
- Slender-billed Gull
- Slender-billed Oriole
- Slender-billed Weaver
- Slender-tailed Nightjar
- Small Ground Finch
- Small Tree Finch
- Smooth-billed Ani
- Snowy-browed Flycatcher
- Snowy Egret
- Sociable Lapwing
- Sociable Weaver
- Social Flycatcher
- Solitary Sandpiper
- Somali Bunting
- Somali Fiscal
- Somali Ostrich
- Sombre Greenbul
- Song Thrush
- Sooty-headed Bulbul
- Sooty Chat
- Sooty Falcon
- South African Shelduck
- South American Snipe
- Southern Banded Snake Eagle
- Southern Black Flycatcher
- Southern Black Korhaan
- Southern Black Tit
- Southern Boubou
- Southern Carmine Bee-eater
- Southern Double-collared Sunbird
- Southern Fiscal
- Southern Grey-headed Sparrow
- Southern Ground Hornbill
- Southern Lapwing
- Southern Masked Weaver
- Southern Mealy Amazon
- Southern Pied Babbler
- Southern Pochard
- Southern Red-billed Hornbill
- Southern Red Bishop
- Southern White-crowned Shrike
- Southern Yellow-billed Hornbill
- Speckle-fronted Weaver
- Speckle-throated Woodpecker
- Speckled Chachalaca
- Speckled Hummingbird
- Speckled Mousebird
- Speckled Pigeon
- Speckled Tanager
- Spectacled Barwing
- Spectacled Weaver
- Speke's Weaver
- Spike-heeled Lark
- Spix's Guan
- Spoon-billed Sandpiper
- Spot-billed Pelican
- Spot-breasted Lapwing
- Spot-winged Grosbeak
- Spotted Dove
- Spotted Eagle-Owl
- Spotted Flycatcher
- Spotted Palm Thrush
- Spotted Redshank
- Spotted Sandpiper
- Spotted Thick-knee
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Square-tailed Drongo-Cuckoo
- Square-tailed Nightjar
- Squirrel Cuckoo
- Stejneger's Stonechat
- Steller's Jay
- Steppe Eagle
- Stork-billed Kingfisher
- Storm's Stork
- Straw-tailed Whydah
- Streak-eared Bulbul
- Streaked Flycatcher
- Streaked Spiderhunter
- Streaked Weaver
- Streaked Wren-Babbler
- Streaky Seedeater
- Striated Bulbul
- Striated Grassbird
- Striated Heron
- Stripe-backed Wren
- Stripe-throated Bulbul
- Striped Cuckoo
- Striped Kingfisher
- Sudan Golden Sparrow
- Sulphur-bellied Warbler
- Sunbittern
- Superb Starling
- Surfbird
- Swahili Sparrow
- Swainson's Sparrow
- Swainson's Spurfowl
- Swallow-tailed Bee-eater
- Swallow-tailed Gull
- Swamp Boubou
- Swamp Flycatcher
- Swee Waxbill
- Sword-billed Hummingbird
- Sykes's Warbler