| Common Name | Scientific name |
|---|---|
| Spruce Grouse | Falcipennis canadensis |
| Spur-winged Goose | Plectropterus gambensis |
| Spur-winged Lapwing | Vanellus spinosus |
| Squacco Heron | Ardeola ralloides |
| Squirrel Cuckoo | Piaya cayana |
| St. Lucia Black Finch | Melanospiza richardsoni |
| St. Lucia Oriole | Icterus laudabilis |
| St. Lucia Parrot | Amazona versicolor |
| St. Lucia Warbler | Setophaga delicata |
| St. Vincent Parrot | Amazona guildingii |
| Star Finch | Neochmia ruficauda |
| Steely-vented Hummingbird | Amazilia saucerottei |
| Stejneger's Petrel | Pterodroma longirostris |
| Stejneger's Stonechat | Saxicola stejnegeri |
| Steller's Eider | Polysticta stelleri |
| Steller's Jay | Cyanocitta stelleri |
| Steller's Sea Eagle | Haliaeetus pelagicus |
| Steppe Eagle | Aquila nipalensis |
| Steppe Grey Shrike | Lanius pallidirostris |
| Stilt Sandpiper | Calidris himantopus |
| Stock Dove | Columba oenas |
| Stolid Flycatcher | Myiarchus stolidus |
| Stonechat | Saxicola torquatus |
| Straight-billed Woodcreeper | Dendroplex picus |
| Straw-necked Ibis | Threskiornis spinicollis |
RingBase adheres to EURING codes.
