- Saffron Finch
- Sahel Bush Sparrow
- Sand Martin
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Savanna Hawk
- Savi's Warbler
- Sayaca Tanager
- Scaled Dove
- Scaly-breasted Munia
- Scarlet-browed Tanager
- Scarlet-rumped Tanager (costaricensis)
- Scarlet Macaw
- Sedge Warbler
- Senegal Coucal
- Senegal Parrot
- Senegal Thick-knee
- Seychelles Blue Pigeon
- Seychelles Bulbul
- Seychelles Kestrel
- Seychelles Sunbird
- Shiny Cowbird
- Short-eared Owl
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Silver-beaked Tanager
- Silvereye
- Silvery-cheeked Hornbill
- Slate-throated Whitestart
- Slender-billed Gull
- Smew
- Smooth-billed Ani
- Snow Bunting
- Snowy Egret
- Song Thrush
- Sooty-headed Bulbul
- Southern Lapwing
- Southern Mealy Amazon
- Southern Rough-winged Swallow
- Southern Screamer
- Spanish Sparrow
- Sparkling Violetear
- Speckled Mousebird
- Speckled Pigeon
- Spotted Dove
- Spotted Flycatcher
- Spotted Nutcracker
- Spotted Palm Thrush
- Spotted Redshank
- Spotted Sandpiper
- Spur-winged Lapwing
- Squacco Heron
- Squirrel Cuckoo
- Stejneger's Stonechat
- Steppe Eagle
- Stock Dove
- Straight-billed Woodcreeper
- Streaked Flycatcher
- Streaked Tuftedcheek
- Striated Heron
- Striped Kingfisher
- Striped Treehunter
- Sudan Golden Sparrow
- Sulphur-bellied Flycatcher
- Summer Tanager
- Sunbittern
- Superb Starling
- Swainson's Flycatcher
- Swallow-tailed Bee-eater
- Swan Goose