- Sacred Kingfisher
- Sahul Sunbird
- Sanderling
- Sandwich Tern
- Sardinian Warbler
- Scopoli's Shearwater
- Shining Flycatcher
- Short-eared Owl
- Short-toed Snake Eagle
- Shy Albatross
- Silver Gull
- Silvereye
- Slender-billed Gull
- Snow Bunting
- Southern House Wren
- Spangled Drongo
- Spinifex Pigeon
- Splendid Fairywren
- Spotted Catbird
- Squacco Heron
- Stejneger's Scoter
- Steller's Sea Eagle
- Straw-necked Ibis
- Striated Thornbill
- Sulphur-crested Cockatoo
- Sunda Zebra Finch
- Superb Lyrebird