- Sabota Lark
- Sahul Sunbird
- Salvin's Prion
- Sandwich Tern
- Savanna Hawk
- Scaly-breasted Munia
- Scarlet Robin
- Senegal Lapwing
- Senegal Thick-knee
- Shining-blue Kingfisher
- Shining Drongo
- Short-tailed Shearwater
- Short-toed Snake Eagle
- Short-winged Cisticola
- Shy Albatross
- Silver Gull
- Slender-billed Greenbul
- Slender-billed Prion
- Snowy-crowned Robin-Chat
- Snowy Albatross
- Soft-plumaged Petrel
- Sooty Albatross
- Sooty Chat
- Sooty Flycatcher
- Sooty Oystercatcher
- South Georgia Diving Petrel
- Southern Carmine Bee-eater
- Southern Giant Petrel
- Southern Rockhopper Penguin
- Southern Royal Albatross
- Speckled Mousebird
- Speckled Tinkerbird
- Splendid Sunbird
- Spotted Greenbul
- Spur-winged Lapwing
- Square-tailed Drongo
- Square-tailed Nightjar
- Square-tailed Saw-wing
- Striated Heron
- Striated Pardalote (substriatus)
- Sulphur-crested Cockatoo
- Superb Fairywren
- Superb Sunbird
- Swamp Harrier
- Sykes's Nightjar