- Saddle-billed Stork
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Sarus Crane
- Scarlet-headed Blackbird
- Scarlet Ibis
- Scopoli's Shearwater
- Secretarybird
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Siberian Crane
- Silver Teal
- Smew
- Song Thrush
- Southern Ground Hornbill
- Southern Pochard
- Southern Screamer
- Spotted Flycatcher
- Spotted Redshank
- Squacco Heron
- Straw-necked Ibis
- Striated Heron
- Sulphur-crested Cockatoo
- Sunbittern
- Sunda Teal
- Sunda Zebra Finch
- Swan Goose