- Saddle-billed Stork
- Saffron Finch
- Santa Marta Brushfinch
- Sayaca Tanager
- Scarlet-chested Sunbird
- Scarlet-fronted Parakeet
- Scarlet-headed Blackbird
- Scarlet Ibis
- Scarlet Macaw
- Scott's Oriole
- Scrub Tanager
- Secretarybird
- Seychelles Paradise Flycatcher
- Seychelles Sunbird
- Shaft-tailed Whydah
- Shikra
- Silver-beaked Tanager
- Silver-throated Tanager
- Silver Gull
- Silvery-cheeked Hornbill
- Slender-billed Weaver
- Snail Kite
- Snow Bunting
- Snowy Egret
- Social Flycatcher
- Sombre Greenbul
- Southern Black Flycatcher
- Southern Black Tit
- Southern Boubou
- Southern Brown-throated Weaver
- Southern Carmine Bee-eater
- Southern Double-collared Sunbird
- Southern Fiscal
- Southern Masked Weaver
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern Rough-winged Swallow
- Southern White-crowned Shrike
- Southern Yellow-billed Hornbill
- Sparkling-tailed Woodstar
- Sparkling Violetear
- Speckle-fronted Weaver
- Speckled Hummingbird
- Speckled Mousebird
- Speckled Pigeon
- Spectacled Tyrannulet
- Spectacled Weaver
- Spinifex Pigeon
- Spot-breasted Oriole
- Spot-crowned Woodcreeper
- Spotted Owlet
- Spotted Sandpiper
- Spotted Woodcreeper
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Squirrel Cuckoo
- Steely-vented Hummingbird
- Stout-billed Cinclodes
- Streak-capped Spinetail
- Streak-headed Antbird
- Streaked Flycatcher
- Streaked Saltator
- Streaked Xenops
- Striated Heron
- Strong-billed Woodcreeper
- Superb Starling
- Swainson's Thrush
- Swallow-tailed Bee-eater
- Swallow-tailed Hummingbird
- Swallow Tanager