- Sabota Lark
- Saddle-billed Stork
- Salvadori's Pheasant
- San Cristobal Mockingbird
- Sanderling
- Scaly-feathered Weaver
- Scarlet-chested Parrot
- Scarlet Macaw
- Sclater's Crowned Pigeon
- Secretarybird
- Sedge Warbler
- Semipalmated Plover
- Short-tailed Nighthawk
- Short-toed Treecreeper
- Silver-beaked Tanager
- Small Ground Finch
- Small Tree Finch
- Smooth-billed Ani
- Sociable Weaver
- Socorro Dove
- Solitary Tinamou
- Southern Cassowary
- Southern Grey-headed Sparrow
- Southern Ground Hornbill
- Southern Masked Weaver
- Southern Mealy Amazon
- Southern Pied Babbler
- Southern Red-billed Hornbill
- Southern Yellow-billed Hornbill
- Spangled Cotinga
- Speckled Chachalaca
- Speckled Pigeon
- Spix's Macaw
- Spot-breasted Woodpecker
- Spur-winged Goose
- Squirrel Cuckoo
- St. Lucia Amazon
- St. Vincent Amazon
- Stark's Lark
- Storm's Stork
- Streaked Flycatcher
- Striated Caracara
- Sumatran Laughingthrush
- Superb Starling
- Swallow-tailed Bee-eater
- Swallow-tailed Gull
- Swamp Boubou
- Swan Goose