- Sacred Kingfisher
- Saffron Finch
- Sage Thrasher
- Salvin's Albatross
- Sanderling
- Sandhill Crane
- Sandstone Shrikethrush
- Sarus Crane
- Satin Bowerbird
- Satin Flycatcher
- Savanna Hawk
- Say's Phoebe
- Scaly-breasted Lorikeet
- Scaly-breasted Munia
- Scarlet Flycatcher
- Scarlet Ibis
- Scarlet Macaw
- Scarlet Myzomela
- Screaming Piha
- Semipalmated Plover
- Semipalmated Sandpiper
- Sharp-tailed Sandpiper
- Shining Bronze Cuckoo
- Shining Flycatcher
- Shiny Cowbird
- Short-billed Dowitcher
- Short-crested Flycatcher
- Short-tailed Hawk
- Short-tailed Swift
- Short-toed Snake Eagle
- Silver-beaked Tanager
- Silver-crowned Friarbird
- Silver Gull
- Silver Gull (scopulinus)
- Silvereye
- Singing Honeyeater
- Slate-colored Grosbeak
- Slate-throated Whitestart
- Slender-footed Tyrannulet
- Smooth-billed Ani
- Snail Kite
- Snow Bunting
- Snow Goose
- Snowy Egret
- Social Flycatcher
- Solitary Sandpiper
- Song Sparrow
- Song Thrush
- Sooty Barbthroat
- Sooty Oystercatcher
- Sooty Tern
- South American Snipe
- South Island Oystercatcher
- South Island Robin
- Southern Beardless Tyrannulet
- Southern Cassowary
- Southern Crested Caracara
- Southern Crowned Pigeon
- Southern Giant Petrel
- Southern Martin
- Southern Mealy Amazon
- Southern Rough-winged Swallow
- Southern Royal Albatross
- Southern White-fringed Antwren
- Southern Whiteface
- Spangled Drongo
- Spectacled Monarch
- Spectacled Thrush
- Spinifex Pigeon
- Spiny-cheeked Honeyeater
- Splendid Fairywren
- Spot-backed Antbird
- Spot-breasted Woodpecker
- Spotted Dove
- Spotted Harrier
- Spotted Pardalote
- Spotted Puffbird
- Spotted Quail-thrush
- Spotted Sandpiper
- Spotted Shag
- Spotted Tanager
- Spotted Tody-Flycatcher
- Spotted Towhee
- Spruce Grouse
- Squirrel Cuckoo
- Star Finch
- Steller's Jay
- Stitchbird
- Straight-billed Hermit
- Straight-billed Woodcreeper
- Straw-necked Ibis
- Streaked Fantail
- Streaked Flycatcher
- Striated Heron
- Striated Pardalote (substriatus)
- Striated Starling
- Striped Cuckoo
- Striped Owl
- Strong-billed Honeyeater
- Sulphur-crested Cockatoo
- Superb Fairywren
- Superb Fruit Dove
- Superb Lyrebird
- Superb Starling
- Swainson's Hawk
- Swallow-tailed Kite
- Swallow-winged Puffbird
- Swamp Harrier