- Saddle-billed Stork
- Sand Martin
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Scaly-breasted Hummingbird
- Scaly-breasted Munia
- Scaly Spurfowl
- Scarlet-rumped Tanager
- Scarlet Macaw
- Scintillant Hummingbird
- Scissor-tailed Kite
- Scrub Greenlet
- Secretarybird
- Sedge Warbler
- Semipalmated Plover
- Semipalmated Sandpiper
- Senegal Coucal
- Senegal Parrot
- Senegal Thick-knee
- Short-billed Dowitcher
- Short-eared Owl
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Silvery-cheeked Hornbill
- Slate-colored Boubou
- Slaty-backed Nightingale-Thrush
- Slaty-tailed Trogon
- Slaty Flowerpiercer
- Slender-billed Gull
- Snow Bunting
- Snowcap
- Snowy Egret
- Song Thrush
- Sooty-capped Chlorospingus
- Sooty Thrush
- Southern Ground Hornbill
- Southern Lapwing
- Southern Rough-winged Swallow
- Spanish Sparrow
- Speckle-fronted Weaver
- Speckled Pigeon
- Spot-billed Pelican
- Spot-breasted Oriole
- Spot-crowned Woodcreeper
- Spotless Starling
- Spotted Crake
- Spotted Dove
- Spotted Flycatcher
- Spotted Redshank
- Spotted Sandpiper
- Spur-winged Goose
- Spur-winged Lapwing
- Squacco Heron
- Squirrel Cuckoo
- Sri Lanka Junglefowl
- Stock Dove
- Streak-backed Oriole
- Streak-headed Woodcreeper
- Striated Heron
- Stripe-headed Sparrow
- Summer Tanager
- Sunbittern
- Superb Starling