- Sri Lanka Green Pigeon
- Sri Lanka Grey Hornbill
- Sri Lanka Hanging Parrot
- Sri Lanka Junglefowl
- Sri Lanka Myna
- Sri Lanka Scimitar Babbler
- Sri Lanka Spurfowl
- Sri Lanka Swallow
- Sri Lanka Thrush
- Sri Lanka Whistling Thrush
- Sri Lanka White-eye
- Sri Lanka Wood Pigeon
- Sri Lanka Woodshrike
- St. Helena Plover
- St. Kitts
- St. Lucia
- St. Lucia Black Finch
- St. Lucia Lagoon
- St. Lucia Oriole
- St. Lucia Parrot
- St. Lucia Warbler
- St. Marks National Wildlife Refuge
- St. Vincent
- St. Vincent Parrot
- St Abb's Head
- St Bees Head
- St Helena
- St Ives Bay and the Hayle Estuary
- St Kilda
- St Mary's Island
- Stabbursdalen National Park and Valdak
- Stagno di Cagliari
- Staines Reservoirs
- Standard-winged Nightjar
- Standardwing
- Stanley Pool
- Star-spotted Nightjar
- Star-throated Antwren
- Star Finch
- Stark's Lark
- Starred Wood Quail
- Starry Owlet-nightjar
- Stauberen
- Steel-blue Flycatcher
- Steel-blue Whydah
- Steely-vented Hummingbird
- Steeple Morden Conservation Area
- Steere's Liocichla
- Steinbach's Canastero
- Stejneger's Petrel
- Stejneger's Scoter
- Steller's Eider
- Steller's Jay
- Steller's Sea Eagle
- Stelvio National Park
- Stephan's Dove
- Stephanophorus
- Stephen's Lorikeet
- Stephens Island Wren
- Steppe Eagle
- Steppes of Lleida (Lerida)(Catalonia)
- Stewart Island
- Stewart Island Shag
- Stierling's Woodpecker
- Stierling's Wren-Warbler
- Stiles's Tapaculo
- Stilt Sandpiper
- Stipple-throated Antwren
- Stitchbird
- Stock Dove
- Stockholm Archipelago
- Stockviken (Gotland)
- Stodmarsh
- Stolid Flycatcher
- Stone Mountain Hawkwatch
- Stone Partridge
- Stora Sjofallet National Park
- Store Mosse National Park
- Stork-billed Kingfisher
- Storm's Stork
- Stormville
- Stour Estuary
- Stout-billed Cinclodes
- Stout-billed Cuckooshrike
- Stout Cisticola
- Stowe (Vermont)
- Straight-billed Earthcreeper
- Straight-billed Hermit
- Straight-billed Reedhaunter
- Straight-billed Woodcreeper
- Straits of Messina
- Straneck's Tyrannulet
- Strange-tailed Tyrant
- Strange Weaver
- Strangford Lough
- Stratford
- Straw-headed Bulbul
- Straw-necked Ibis
- Straw-tailed Whydah
- Streak-backed Antshrike
- Streak-backed Canastero
- Streak-backed Oriole
- Streak-breasted Bulbul
- Streak-breasted Fantail
- Streak-breasted Honeyeater
- Streak-breasted Scimitar Babbler
- Streak-breasted Treehunter
- Streak-breasted Woodpecker
- Streak-capped Antwren
- Streak-capped Spinetail
- Streak-capped Treehunter
- Streak-chested Antpitta
- Streak-crowned Antvireo
- Streak-eared Bulbul
- Streak-fronted Thornbird
- Streak-headed Antbird
- Streak-headed Honeyeater
- Streak-headed Mannikin
- Streak-headed White-eye
- Streak-headed Woodcreeper
- Streak-necked Flycatcher
- Streak-throated Barwing
- Streak-throated Bush Tyrant
- Streak-throated Canastero
- Streak-throated Fulvetta
- Streak-throated Hermit
- Streak-throated Swallow
- Streak-throated Woodpecker
- Streaked Barwing
- Streaked Berrypecker
- Streaked Bowerbird
- Streaked Bulbul
- Streaked Fantail
- Streaked Flycatcher
- Streaked Laughingthrush
- Streaked Reed Warbler
- Streaked Rosefinch
- Streaked Saltator
- Streaked Scrub Warbler
- Streaked Shearwater
- Streaked Spiderhunter
- Streaked Tit-Spinetail
- Streaked Tuftedcheek
- Streaked Weaver
- Streaked Wren-Babbler
- Streaked Xenops
- Streaky-breasted Flufftail
- Streaky-breasted Jungle Flycatcher
- Streaky-breasted Spiderhunter
- Streaky-headed Seedeater
- Streaky Seedeater
- Streamer-tailed Tyrant
- Streamertail
- Strepera
- Stresemann's Bristlefront
- Stresemann's Bush Crow
- Striated Antbird
- Striated Antthrush
- Striated Babbler
- Striated Bulbul
- Striated Caracara
- Striated Earthcreeper
- Striated Fieldwren
- Striated Grassbird
- Striated Grasswren
- Striated Heron
- Striated Laughingthrush
- Striated Lorikeet
- Striated Pardalote
- Striated Prinia
- Striated Softtail
- Striated Starling
- Striated Swallow
- Striated Thornbill
- Striated Wren-Babbler
- Striated Yuhina
- Strickland's Woodpecker
- Striolated Bunting
- Striolated Tit-Spinetail
- Stripe-backed Antbird
- Stripe-backed Bittern
- Stripe-backed Wren
- Stripe-breasted Rhabdornis
- Stripe-breasted Spinetail
- Stripe-breasted Starthroat
- Stripe-breasted Tit
- Stripe-breasted Woodpecker
- Stripe-breasted Wren
- Stripe-capped Sparrow
- Stripe-cheeked Greenbul
- Stripe-cheeked Woodpecker
- Stripe-chested Antwren
- Stripe-crowned Spinetail
- Stripe-faced Wood Quail
- Stripe-headed Antpitta
- Stripe-headed Brush Finch
- Stripe-headed Rhabdornis
- Stripe-headed Sparrow
- Stripe-necked Tody-Tyrant
- Stripe-tailed Hummingbird
- Stripe-tailed Yellow Finch
- Stripe-throated Bulbul
- Stripe-throated Hermit
- Stripe-throated Jery
- Stripe-throated Wren
- Stripe-throated Yuhina
- Striped Crake
- Striped Cuckoo
- Striped Flufftail
- Striped Honeyeater
- Striped Kingfisher
- Striped Laughingthrush
- Striped Manakin
- Striped Owl
- Striped Pipit
- Striped Sparrow
- Striped Tit-Babbler
- Striped Treehunter
- Striped Woodcreeper
- Striped Woodhaunter
- Striped Woodpecker
- Striped Wren-Babbler
- Strong-billed Honeyeater
- Strong-billed Woodcreeper
- Strumpshaw Fen
- Stub-tailed Antbird
- Stub-tailed Spadebill
- Stubble Quail
- Studen Kladenetz
- Stuhlmann's Double-collared Sunbird
- Stuhlmann's Starling
- Styan's Bulbul
- Stygian Owl
- Subalpine Robin
- Subalpine Warbler
- Subantarctic Shearwater
- Subantarctic Snipe
- Subdesert Brush Warbler
- Subdesert Mesite
- Subtropical Doradito
- Subtropical Pygmy Owl
- Such's Antthrush
- Sucre Antpitta
- Sudan Golden Sparrow
- Suiriri Flycatcher
- Sula
- Sula Cicadabird
- Sula Cuckoo-Dove
- Sula Dwarf Kingfisher
- Sula Fruit Dove
- Sula Hanging Parrot
- Sula Megapode
- Sula Myna
- Sula Pitta
- Sula Scops Owl
- Sulawesi Babbler
- Sulawesi Blue Flycatcher
- Sulawesi Cicadabird
- Sulawesi Cuckoo
- Sulawesi Cuckooshrike
- Sulawesi Drongo
- Sulawesi Dwarf Kingfisher
- Sulawesi Goshawk
- Sulawesi Ground Dove
- Sulawesi Hanging Parrot
- Sulawesi Hawk-Eagle
- Sulawesi Hornbill
- Sulawesi Leaf Warbler
- Sulawesi Masked Owl
- Sulawesi Myna
- Sulawesi Myzomela
- Sulawesi Nightjar
- Sulawesi Pitta
- Sulawesi Pygmy Woodpecker
- Sulawesi Scops Owl
- Sulawesi Serpent Eagle
- Sulawesi Streaked Flycatcher
- Sulawesi Swiftlet
- Sulawesi Thrush
- Sulawesi Whistler
- Sulawesi Woodcock
- Sulphur-bearded Reedhaunter
- Sulphur-bellied Bulbul
- Sulphur-bellied Flycatcher
- Sulphur-bellied Tyrannulet
- Sulphur-bellied Tyrant-Manakin
- Sulphur-bellied Warbler
- Sulphur-bellied Whistler
- Sulphur-billed Nuthatch
- Sulphur-breasted Parakeet
- Sulphur-breasted Warbler
- Sulphur-crested Cockatoo
- Sulphur-rumped Flycatcher
- Sulphur-rumped Tanager
- Sulphur-throated Finch
- Sulphur-winged Parakeet
- Sulphury Flycatcher
- Sultan's Cuckoo-Dove
- Sultan Tit
- Sultanpur National Park
- Sulu Bleeding-heart
- Sulu Boobook
- Sulu Hornbill
- Sulu Pygmy Woodpecker
- Sumatran Babbler
- Sumatran Cochoa
- Sumatran Drongo
- Sumatran Frogmouth
- Sumatran Green Pigeon
- Sumatran Ground Cuckoo
- Sumatran Laughingthrush
- Sumatran Leafbird
- Sumatran Partridge
- Sumatran Treepie
- Sumatran Trogon
- Sumatran Whistling Thrush
- Sumatran Wren-Babbler
- Sumava National Park
- Sumba Boobook
- Sumba Brown Flycatcher
- Sumba Buttonquail
- Sumba Flycatcher
- Sumba Green Pigeon
- Sumba Hornbill
- Sumba Myzomela
- Sumburgh Head
- Sumichrast's Wren
- Summer Tanager
- Sun Lark
- Sun Parakeet
- Sunbittern
- Sunda Blue Flycatcher
- Sunda Bulbul
- Sunda Bush Warbler
- Sunda Coucal
- Sunda Cuckoo
- Sunda Cuckooshrike
- Sunda Forktail
- Sunda Frogmouth
- Sunda Ground Cuckoo
- Sunda Laughingthrush
- Sunda Minivet
- Sunda Robin
- Sunda Scops Owl
- Sunda Teal


