- Sabota Lark
- Saddle-billed Stork
- Saffron-billed Sparrow
- Saffron Finch
- Salvadori's Antwren
- Sanderling
- Santa Marta Antbird
- Santa Marta Brushfinch
- Sapphire-spangled Emerald
- Savanna Hawk
- Saw-billed Hermit
- Sayaca Tanager
- Scale-throated Hermit
- Scaled Antbird
- Scaled Dove
- Scaled Pigeon
- Scaled Woodcreeper
- Scaly-feathered Weaver
- Scaly-headed Parrot
- Scarlet-bellied Mountain Tanager
- Scarlet-chested Sunbird
- Scarlet-fronted Parakeet
- Scarlet-headed Blackbird
- Scarlet-throated Tanager
- Scissor-tailed Nightjar
- Screaming Piha
- Scrub Greenlet
- Secretarybird
- Semipalmated Plover
- Senegal Coucal
- Senegal Lapwing
- Sepia-capped Flycatcher
- Serra do Mar Bristle Tyrant
- Serra do Mar Tyrant-Manakin
- Serra Finch
- Seven-colored Tanager
- Seychelles Black Parrot
- Seychelles Blue Pigeon
- Seychelles Bulbul
- Seychelles Fody
- Seychelles Magpie-Robin
- Seychelles Paradise Flycatcher
- Seychelles Sunbird
- Seychelles Warbler
- Shaft-tailed Whydah
- Sharp-billed Canastero
- Sharp-billed Treehunter
- Sharp-tailed Grass Tyrant
- Sharp-tailed Streamcreeper
- Sharpbill
- Shikra
- Shiny Cowbird
- Short-billed Miner
- Short-crested Flycatcher
- Shrike-like Tanager
- Sibilant Sirystes
- Sickle-winged Guan
- Sierran Elaenia
- Silver-beaked Tanager
- Silver Teal
- Silvery-cheeked Antshrike
- Silvery Grebe
- Slate-throated Whitestart
- Slaty-backed Chat-Tyrant
- Slaty-breasted Wood Rail
- Slaty-capped Flycatcher
- Slaty Bristlefront
- Slaty Egret
- Slender-billed Inezia
- Small-headed Elaenia
- Smoke-colored Pewee
- Smooth-billed Ani
- Snail Kite
- Snowy Egret
- Snowy Plover
- Sociable Weaver
- Social Flycatcher
- Solitary Cacique
- Solitary Sandpiper
- Sombre Greenbul
- Sombre Hummingbird
- Sooretama Slaty Antshrike
- Sooty-fronted Spinetail
- Sooty-headed Wren
- Sooty Grassquit
- Sooty Shearwater
- Sooty Tyrannulet
- South African Shelduck
- Southern Antpipit
- Southern Bald Ibis
- Southern Beardless Tyrannulet
- Southern Black Flycatcher
- Southern Black Tit
- Southern Boubou
- Southern Brown-throated Weaver
- Southern Carmine Bee-eater
- Southern Crested Guineafowl
- Southern Double-collared Sunbird
- Southern Fiscal
- Southern Giant Petrel
- Southern Grey-headed Sparrow
- Southern Ground Hornbill
- Southern House Wren
- Southern Lapwing
- Southern Masked Weaver
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern Red Bishop
- Southern Rough-winged Swallow
- Southern Screamer
- Southern Tropical Pewee
- Southern White-crowned Shrike
- Southern White-fringed Antwren
- Southern Yellow-billed Hornbill
- Southern Yellow White-eye
- Southern Yellowthroat
- Spanish Sparrow
- Sparkling Violetear
- Speckle-breasted Antpitta
- Speckled Chachalaca
- Speckled Hummingbird
- Speckled Mousebird
- Speckled Pigeon
- Spectacled Tyrant
- Spectacled Weaver
- Spectacled Whitestart
- Spike-heeled Lark
- Spix's Spinetail
- Spot-backed Puffbird
- Spot-billed Ground Tyrant
- Spot-billed Toucanet
- Spot-breasted Antvireo
- Spot-breasted Woodpecker
- Spot-crowned Barbet
- Spot-flanked Gallinule
- Spot-winged Pigeon
- Spotted Barbtail
- Spotted Eagle-Owl
- Spotted Flycatcher
- Spotted Sandpiper
- Spotted Tanager
- Spotted Thick-knee
- Spur-winged Goose
- Squacco Heron
- Squamate Antbird
- Square-tailed Nightjar
- Squirrel Cuckoo
- Star-chested Treerunner
- Star-throated Antwren
- Straight-billed Woodcreeper
- Streak-headed Woodcreeper
- Streak-throated Bush Tyrant
- Streaked Flycatcher
- Streaked Saltator
- Streaked Tuftedcheek
- Streaked Xenops
- Streaky-headed Seedeater
- Streamer-tailed Tyrant
- Striated Heron
- Stripe-backed Antbird
- Stripe-backed Wren
- Stripe-crowned Spinetail
- Stripe-tailed Yellow Finch
- Striped Cuckoo
- Striped Kingfisher
- Striped Owl
- Striped Woodpecker
- Subtropical Cacique
- Sunbittern
- Surucua Trogon
- Swainson's Spurfowl
- Swallow-tailed Bee-eater
- Swallow-tailed Cotinga
- Swallow-tailed Hummingbird
- Swallow-tailed Kite
- Swallow Tanager
- Swamp Boubou