- Saddle-billed Stork
- Saffron Finch
- Sand Martin
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Sayaca Tanager
- Scaly-breasted Munia
- Scaly-breasted Thrasher
- Scaly-feathered Weaver
- Scarlet-rumped Tanager
- Scarlet Ibis
- Sedge Warbler
- Semipalmated Plover
- Shiny Cowbird
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Slaty-tailed Trogon
- Slaty Egret
- Slender-billed Gull
- Smew
- Snail Kite
- Snow Goose
- Snowy Egret
- Sociable Weaver
- Song Thrush
- Southern Black Flycatcher
- Southern Brown-throated Weaver
- Southern Carmine Bee-eater
- Southern Fiscal
- Southern Grey-headed Sparrow
- Southern Lapwing
- Southern Masked Weaver
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern Screamer
- Southern Yellow-billed Hornbill
- Spanish Sparrow
- Speckled Pigeon
- Spotted Crake
- Spotted Flycatcher
- Spotted Redshank
- Spotted Sandpiper
- Spur-winged Goose
- Squacco Heron
- Steller's Jay
- Streak-backed Oriole
- Striated Heron
- Swainson's Spurfowl
- Swallow-tailed Bee-eater
- Swamp Boubou
- Syrian Woodpecker