| Common Name | Scientific name |
|---|---|
| Stygian Owl | Asio stygius |
| Subalpine Warbler | Sylvia cantillans |
| Sudan Golden-Sparrow | Passer luteus |
| Sulphur-bellied Flycatcher | Myiodynastes luteiventris |
| Sulphur-crested Cockatoo | Cacatua galerita |
| Sulphur-rumped Flycatcher | Myiobius sulphureipygius |
| Sulphur-rumped Tanager | Heterospingus rubrifrons |
| Sulphur-winged Parakeet | Pyrrhura hoffmanni |
| Sumichrast's Wren | Hylorchilus sumichrasti |
| Summer Tanager | Piranga rubra |
| Sun Parakeet | Aratinga solstitialis |
| Sunbittern | Eurypyga helias |
| Sungrebe | Heliornis fulica |
| Superb Parrot | Polytelis swainsonii |
| Superb Starling | Lamprotornis superbus |
| Surf Scoter | Melanitta perspicillata |
| Surfbird | Calidris virgata |
| Swainson's Hawk | Buteo swainsoni |
| Swainson's Thrush | Catharus ustulatus |
| Swainson's Warbler | Limnothlypis swainsonii |
| Swallow Tanager | Tersina viridis |
| Swallow-tailed Gull | Creagrus furcatus |
| Swallow-tailed Kite | Elanoides forficatus |
| Swamp Sparrow | Melospiza georgiana |
| Swan Goose | Anser cygnoides |
RingBase adheres to EURING codes.
