- Sacred Kingfisher
- Salvin's Albatross
- Sanderling
- Sardinian Warbler
- Scarlet-rumped Tanager
- Scarlet-thighed Dacnis
- Scarlet Macaw
- Short-toed Snake Eagle
- Short-toed Treecreeper
- Silver Gull (scopulinus)
- Silvereye
- Slate-throated Whitestart
- Slaty Flowerpiercer
- Song Thrush
- Sooty-capped Chlorospingus
- South Island Robin
- South Island Takahe
- Southern Brown Kiwi
- Southern House Wren
- Spectacled Warbler
- Spotted Dove
- Spotted Flycatcher
- Spotted Redshank
- Spotted Sandpiper
- Spotted Shag
- Squirrel Cuckoo
- Stitchbird
- Stock Dove
- Strong-billed Woodcreeper
- Sulphur-rumped Myiobius
- Swamp Harrier