- St Kilda Scotland
- St Kitts
- St Lucia Black Finch
- St Lucia Lagoon Zululand South Africa
- St Lucia Parrot
- St Lucia Warbler
- St Marks National Wildlife Refuge(Wakulla County)
- St Mary's Island
- St Thoma's Canary
- St Vincent
- Stabbursdalen National Park and Valdak
- Stabbursdalen National Park and Valdak Norway
- Stachyridopsis
- Stachyridopsis ambigua
- Stachyridopsis chrysaea
- Stachyridopsis pyrrhops
- Stachyridopsis rodolphei
- Stachyridopsis ruficeps
- Stachyridopsis ruficeps praecognita
- Stachyridopsis rufifrons
- Stachyris
- Stachyris ambigua
- Stachyris capitalis
- Stachyris chrysaea
- Stachyris dennistouni
- Stachyris erythroptera
- Stachyris grammiceps
- Stachyris herberti
- Stachyris humei
- Stachyris hypogrammica
- Stachyris latistriata
- Stachyris leucotis
- Stachyris maculata
- Stachyris melanothorax
- Stachyris nigriceps
- Stachyris nigriceps borneensis
- Stachyris nigriceps yunnanensis
- Stachyris nigricollis
- Stachyris nigrocapitata
- Stachyris nigrorum
- Stachyris nonggangensis
- Stachyris oglei
- Stachyris plateni
- Stachyris poliocephala
- Stachyris pygmaeus
- Stachyris pyrrhops
- Stachyris roberti
- Stachyris rodolphei
- Stachyris ruficeps
- Stachyris rufifrons
- Stachyris speciosa
- Stachyris strialata
- Stachyris striata
- Stachyris striolata
- Stachyris striolata swinhoei
- Stachyris thoracica
- Stachyris whiteheadi
- Stactocichla
- Stactolaema
- Stactolaema anchietae
- Stactolaema leucotis
- Stactolaema olivacea
- Stactolaema sowerbyi
- Stactolaema whytii
- Staffordshire
- Stagemaker
- Stagemaker Bowerbird
- Stager's Piculet
- Stagno di Cagliari
- Stagno di Cagliari(Cagliari Sardinia Italy)
- Stagno di Cagliari (Sardinia)
- Stagonopleura
- Stagonopleura bella
- Stagonopleura guttata
- Stagonopleura oculata
- Staines Reservoirs
- Stalker's White-eye
- Standard-winged Nightjar
- Standardwing
- Standardwing Bird-of-paradise
- Stanley Bustard
- Stanley Pool
- Staphida
- Staphida castaniceps
- Staphida everetti
- Staphida torqueola
- Star-chested Treerunner
- Star-spotted Nightjar
- Star-throated Antwren
- Star Finch
- Stark's Lark
- Starnoenas
- Starnoenas cyanocephala
- Starred Wood-Quail
- Starred Wood Quail
- Starry Owlet-Nightjar
- Starry Owlet-nightjar
- Starry Owlet Nightjar
- Statocichla annamensis
- Statocichla merulina
- Stauberen
- Stauberen (Switzerland)
- Steamer-Duck
- Steamer-Ducks
- Steamer Duck
- Steamer Ducks
- Steamerduck
- Steamerducks
- Steatornis
- Steatornis caripensis
- Steatornithidae
- Steel-blue Flycatcher
- Steel-blue Myiagra
- Steel-blue Whydah
- Steel-blue Widow
- Steely-vented Hummingbird
- Steeple Morden Conservation Area
- Steere's Babbler
- Steere's Broadbill
- Steere's Coucal
- Steere's Liocichla
- Steere's Pitta
- Steganopus tricolor
- Steinbach's Canastero
- Stejneger's Petrel
- Stejneger's Scoter
- Stejneger's Stonechat
- Stelgidillas
- Stelgidillas gracilirostris
- Stelgidopteryx
- Stelgidopteryx andecola
- Stelgidopteryx fucata
- Stelgidopteryx ridgwayi
- Stelgidopteryx ruficollis
- Stelgidopteryx ruficollis ruficollis
- Stelgidopteryx ruficollis uropygialis
- Stelgidopteryx serripennis
- Stella's Lorikeet
- Stellar's Jay
- Steller's Eider
- Steller's Jay
- Steller's Sea-Eagle
- Steller's Sea Eagle
- Stellula
- Stellula calliope
- Stelvio National Park
- Stelvio National Park Italy
- Stenostira
- Stenostira scita
- Stenostiridae
- Stepanyan's Grasshopper Warbler
- Stephan's Dove
- Stephan's Emerald Dove
- Stephanie's Astrapia
- Stephanie's Bird-of-paradise
- Stephanie's Bird of paradise
- Stephanoaetus
- Stephanoaetus coronatus
- Stephanophorus
- Stephanophorus diadematus
- Stephanoxis
- Stephanoxis lalandi
- Stephanoxis lalandi loddigesii
- Stephanoxis loddigesii
- Stephen's Lorikeet
- Stephens Island Wren
- Steppe Buzzard
- Steppe Eagle
- Steppe Gray Shrike
- Steppe Grey Shrike
- Steppe Gull
- Steppes of Leida (Lerida)(Catalonia, Spain)
- Steppes of Lleida (Lerida)(Catalonia)
- Steppes of Lleida (Lerida)(Catalonia, Spain)
- Stercorariidae
- Stercorarius
- Stercorarius antarctica
- Stercorarius antarcticus
- Stercorarius antarcticus antarcticus
- Stercorarius antarcticus lonnbergi
- Stercorarius chilensis
- Stercorarius longicaudus
- Stercorarius lonnbergi
- Stercorarius maccormicki
- Stercorarius parasiticus
- Stercorarius pomarinus
- Stercorarius skua
- Sterna
- Sterna acuflavidus
- Sterna acuticauda
- Sterna albifrons
- Sterna aleutica
- Sterna anaethetus
- Sterna antillarum
- Sterna aurantia
- Sterna balaenarum
- Sterna bengalensis
- Sterna bergii
- Sterna bernsteini
- Sterna caspia
- Sterna dougalli
- Sterna dougallii
- Sterna elegans
- Sterna forsteri
- Sterna fuscata
- Sterna hirundinacea
- Sterna hirundo
- Sterna lorata
- Sterna lunata
- Sterna maxima
- Sterna nereis
- Sterna nilotica
- Sterna paradisaea
- Sterna repressa
- Sterna sandvicensis
- Sterna saundersi
- Sterna striata
- Sterna striata striata
- Sterna sumatrana
- Sterna superciliaris
- Sterna trudeaui
- Sterna virgata
- Sterna vittata
- Sterna vittata tristanensisi
- Sternidae
- Sternoclyta
- Sternoclyta cyanopectus
- Sternula
- Sternula albifrons
- Sternula antillarum
- Sternula balaenarum
- Sternula lorata
- Sternula nereis
- Sternula nereis davisae
- Sternula saundersi
- Sternula superciliaris
- Sterrhoptilus
- Sterrhoptilus capitalis
- Sterrhoptilus dennistouni
- Sterrhoptilus nigrocapitatus
- Sterrhoptilus plateni
- Sterrhoptilus pygmaeus
- Stewart Island
- Stewart Island New Zealand
- Stewart Island Shag
- Stewart island Robin
- Stictocarbo punctatus
- Stictonetta
- Stictonetta naevosa
- Stierling's Woodpecker
- Stierling's Wren-Warbler
- Stierling's Wren Warbler
- Stigmatopelia chinensis
- Stigmatopelia senegalensis
- Stigmatura
- Stigmatura budytoides
- Stigmatura budytoides gracilis
- Stigmatura napensis
- Stigmatura napensis bahiae
- Stiles's Tapaculo
- Stilpnia preciosa
- Stilt Sandpiper
- Stiltia
- Stiltia isabella
- Stiphrornis
- Stiphrornis erythrothorax
- Stiphrornis erythrothorax pyrrholaemus
- Stiphrornis gabonensis
- Stiphrornis sanghensis
- Stiphrornis xanthogaster
- Stipiturus
- Stipiturus malachurus
- Stipiturus mallee
- Stipiturus ruficeps
- Stipple-throated Antwren
- Stitchbird
- Stizorhina
- Stizorhina finschi
- Stizorhina fraseri
- Stock Dove
- Stock Pigeon
- Stockholm Archipelago
- Stockholm Archipelago Sweden
- Stockviken
- Stockviken (Gotland)
- Stockviken Gotland, Sweden
- Stockwhip Bird
- Stodmarsh
- Stodmarsh National Nature Reserve
- Stoliczka's Bushchat
- Stoliczka's Tit-Warbler
- Stoliczka's Tit Warbler
- Stoliczka's Treecreeper
- Stolid Flycatcher
- Stomiopera
- Stomiopera flava
- Stomiopera unicolor
- Stone-Curlew
- Stone-curlew
- Stone Curlew
- Stone Mountain Hawkwatch
- Stone Partridge
- Stora Sjofallet National Park
- Stora Sjofallet National Park Sweden
- Store Mosse National Park
- Store Mosse National Park Sweden
- Stork
- Stork-billed Kingfisher
- Storks
- Storm's Stork
- Storm-Petrel
- Storm-Petrels
- Storm Petrel
- Storm Petrels
- Stormville
- Stormville, New York(Northeastern US; New York)
- Stour Estuary
- Stour Estuary RSPB Reserve (Essex)
- Stout-billed Cinclodes
- Stout-billed Cuckoo-shrike
- Stout-billed Cuckooshrike
- Stout-billed Graybird
- Stout-billed Greybird
- Stout Cisticola
- Stowe
- Stowe (Vermont)
- Straight-billed Earthcreeper
- Straight-billed Green Sunbird
- Straight-billed Hermit
- Straight-billed Reedhaunter
- Straight-billed Woodcreeper
- Straight-crested Helmet Shrike
- Straits of Messina
- Straits of Messina Sicily
- Straneck's Tyrannulet
- Strange-tailed Tyrant
- Strange Weaver
- Strangford Lough
- Strangford Lough Northern Ireland
- Stratford
- Straw-backed Tanager
- Straw-crowned Bulbul
- Straw-headed Bulbul
- Straw-necked Ibis
- Straw-tailed Whydah


