- Sanderling
- Scaly-breasted Munia
- Scopoli's Shearwater
- Shore Plover
- Short-toed Snake Eagle
- Siberian Jay
- Snow Bunting
- Snowy Owl
- Song Thrush
- Spanish Imperial Eagle
- Sparkling Violetear
- Spectacled Warbler
- Spotless Starling
- Spotted Flycatcher
- Spotted Redshank
- Squacco Heron
- Stock Dove
- Streak-throated Canastero
- Striated Heron