- Sacred Kingfisher
- Salvin's Albatross
- Scarlet-rumped Tanager
- Scarlet-thighed Dacnis
- Scarlet Macaw
- Silver Gull (scopulinus)
- Silvereye
- Slate-throated Whitestart
- Slaty Flowerpiercer
- Song Thrush
- Sooty-capped Bush Tanager
- South Island Robin
- South Island Takahe
- Southern Brown Kiwi
- Spotted Dove
- Spotted Flycatcher
- Spotted Sandpiper
- Spotted Shag
- Squirrel Cuckoo
- Stitchbird
- Strong-billed Woodcreeper
- Sulphur-rumped Myiobius
- Swamp Harrier