- Santa Cruz Ground Dove
- Secretarybird
- Silvereye
- Silvery-cheeked Hornbill
- Song Sparrow
- Song Thrush
- Southern Black Flycatcher
- Southern Masked Weaver
- Southern Red-billed Hornbill
- Southern Yellow-billed Hornbill
- Spangled Cotinga
- Sparkling Violetear
- Speckled Mousebird
- Speckled Pigeon
- Spot-winged Pigeon
- Spotted Laughingthrush
- Spotted Tanager
- Spotted Thick-knee
- Spotted Towhee
- Spotted Whistling Duck
- St. Vincent Amazon
- Striated Heron
- Sulawesi Ground Dove
- Sulawesi Hornbill
- Swainson's Spurfowl
- Swan Goose