- Swainson's Thrush
- Swainson's Warbler
- Swainsons Hawk
- Swallow-Tanager
- Swallow-tailed Bee-eater
- Swallow-tailed Cotinga
- Swallow-tailed Gull
- Swallow-tailed Hummingbird
- Swallow-tailed Kite
- Swallow-tailed Manakin
- Swallow-tailed Nightjar
- Swallow-wing
- Swallow-wing Puffbird
- Swallow-winged Puffbird
- Swallow Flycatcher
- Swallow Pond
- Swallow Tailed Kite
- Swallow Tanager
- Swamp Alseonax
- Swamp Boubou
- Swamp Flycatcher
- Swamp Francolin
- Swamp Grass Babbler
- Swamp Greenbul
- Swamp Harrier
- Swamp Nightjar
- Swamp Palm Bulbul
- Swamp Prinia
- Swamp Sparrow
- Swamphen
- Swamphens
- Swan
- Swan Goose
- Swan Lake National Wildlife Refuge
- Swan Lake National Wildlife Refuge(Sumner, Missouri)
- Swan River Honeyeater
- Swans
- Swaziland
- Sweden
- Swee Waxbill
- Swierstra's Francolin
- Swift Parrot
- Swift Tern
- Swinhoe's Minivet
- Swinhoe's Pheasant
- Swinhoe's Pitta
- Swinhoe's Plover
- Swinhoe's Rail
- Swinhoe's Robin
- Swinhoe's Snipe
- Swinhoe's Storm-Petrel
- Swinhoe's Storm-petrel
- Swinhoe's Storm Petrel
- Swinhoe's White-eye
- Swiss Alps
- Swiss Jura
- Swiss National Park
- Swiss National Park (Switzerland)
- Swiss National Park Switzerland
- Switzerland
- Sword-billed Hummingbird
- Sword Billed Hummingbird
- Swynnerton's Robin
- Swynnertonia
- Swynnertonia swynnertoni
- Syke's Nightjar
- Syke's Short-toed Lark
- Sykes' Crested Lark
- Sykes' Warbler
- Sykes's Lark
- Sykes's Nightjar
- Sykes's Short-toed Lark
- Sykes's Wagtail
- Sykes's Warbler
- Sylvia
- Sylvia abyssinica
- Sylvia althaea
- Sylvia atricapilla
- Sylvia balearica
- Sylvia boehmi
- Sylvia borin
- Sylvia buryi
- Sylvia cantillans
- Sylvia cantillans inornata
- Sylvia cantillans moltonii
- Sylvia communis
- Sylvia communis communis
- Sylvia conspicillata
- Sylvia crassirostris
- Sylvia curruca
- Sylvia deserti
- Sylvia deserticola
- Sylvia deserticola maroccana
- Sylvia dohrni
- Sylvia hortensis
- Sylvia layardi
- Sylvia leucomelaena
- Sylvia lugens
- Sylvia margelanica
- Sylvia melanocephala
- Sylvia melanothorax
- Sylvia minula
- Sylvia moltonii
- Sylvia mystacea
- Sylvia nana
- Sylvia nigricapilla
- Sylvia nisoria
- Sylvia rueppelli
- Sylvia ruppeli
- Sylvia sarda
- Sylvia sarda balearica
- Sylvia subalpina
- Sylvia subcaerulea
- Sylvia subcaeruleum
- Sylvia subcoerulea
- Sylvia undata
- Sylvietta
- Sylvietta brachyura
- Sylvietta chapini
- Sylvietta denti
- Sylvietta isabellina
- Sylvietta leucophrys
- Sylvietta philippae
- Sylvietta rufescens
- Sylvietta ruficapilla
- Sylvietta virens
- Sylvietta whytii
- Sylviidae
- Sylviorthorhynchus
- Sylviorthorhynchus desmurii
- Sylviorthorhynchus desmursii
- Sylviparus
- Sylviparus modestus
- Syma
- Syma megarhyncha
- Syma torotoro
- Syma torotoro flavirostris
- Symposiachrus
- Symposiachrus axillaris
- Symposiachrus barbatus
- Symposiachrus bimaculatus
- Symposiachrus boanensis
- Symposiachrus brehmii
- Symposiachrus browni
- Symposiachrus everetti
- Symposiachrus guttula
- Symposiachrus infelix
- Symposiachrus julianae
- Symposiachrus leucurus
- Symposiachrus loricatus
- Symposiachrus manadensis
- Symposiachrus menckei
- Symposiachrus mundus
- Symposiachrus rubiensis
- Symposiachrus sacerdotum
- Symposiachrus trivirgatus
- Symposiachrus verticalis
- Symposiachrus vidua
- Synallaxis
- Synallaxis albescens
- Synallaxis albigularis
- Synallaxis albilora
- Synallaxis azarae
- Synallaxis azarae media
- Synallaxis beverlyae
- Synallaxis brachyura
- Synallaxis cabanisi
- Synallaxis candei
- Synallaxis castanea
- Synallaxis cherriei
- Synallaxis chinchipensis
- Synallaxis cinerascens
- Synallaxis cinerea
- Synallaxis cinnamomea
- Synallaxis courseni
- Synallaxis erythrothorax
- Synallaxis frontalis
- Synallaxis fuscorufa
- Synallaxis gujanensis
- Synallaxis hellmayri
- Synallaxis hypochondriaca
- Synallaxis hypospodia
- Synallaxis infuscata
- Synallaxis kollari
- Synallaxis macconnelli
- Synallaxis maranonica
- Synallaxis moesta
- Synallaxis propinqua
- Synallaxis ruficapilla
- Synallaxis rutilans
- Synallaxis scutata
- Synallaxis spixi
- Synallaxis stictothorax
- Synallaxis subpudica
- Synallaxis tithys
- Synallaxis unirufa
- Synallaxis whitneyi
- Synallaxis zimmeri
- Syndactyla
- Syndactyla dimidiata
- Syndactyla guttulata
- Syndactyla roraimae
- Syndactyla ruficollis
- Syndactyla rufosuperciliata
- Syndactyla rufosuperciliata oleaginea
- Syndactyla striata
- Syndactyla striatus
- Syndactyla subalaris
- Syndactyla ucayalae
- Syndicate
- Synoicus
- Synoicus adansonii
- Synoicus chinensis
- Synoicus ypsilophorus
- Synthliboramphus
- Synthliboramphus antiquus
- Synthliboramphus craveri
- Synthliboramphus hypoleucus
- Synthliboramphus scrippsi
- Synthliboramphus wumizusume
- Sypheotides
- Sypheotides indica
- Sypheotides indicus
- Syria
- Syrian Serin
- Syrian Woodpecker
- Syrigma
- Syrigma sibilatrix
- Syrmaticus
- Syrmaticus ellioti
- Syrmaticus humiae
- Syrmaticus mikado
- Syrmaticus reevesii
- Syrmaticus soemmerringii
- Syrrhaptes
- Syrrhaptes paradoxus
- Syrrhaptes tibetanus
- Systellura
- Systellura decussata
- Systellura longirostris
- Szczecin Bay
- Szczecin Bay Area Poland
- Szechenyi's Monal-Partridge
- Szechenyi's Monal Partridge
- Szechenyi's Partridge
- Szechenyi's monal-partridge
- Szechuan Gray Jay
- Szechuan Grey Jay
- Szechuan Jay
- Szechwan
- Szechwan Liocichla
- Szeged Fish Ponds
- Szeged Fish Ponds(Csongrad County)
- São Francisco Sparrow
- São Francisco de Paula - Veraneio Hampel
- São Francisco de Paula - Veraneio Hampel (South Brazil)
- São Tomé
- São Tomé Canary
- São Tomé Grosbeak
- São Tomé Grosbeak Weaver
- São Tomé Ibis
- São Tomé Spinetailed Swift
- TC-14E
- TC-17E II AF-S, AF-I Teleconverter
- TC-E17ED
- TC3-ED 3x Teleconverter
- TSN1
- TSN823M & TSN 824M
- TSN 611 27* eye-piece
- TV-85
- TYRANNUS DOMINICENSIS
- Ta'Cenc Cliffs Bird Sanctuary
- Ta'Cenc Cliffs Bird Sanctuary Malta
- Tabar Pitta
- Tabasco
- Tabiky Newtonia
- Tablas Drongo
- Tablas Fantail
- Tablas de Daimiel National Park
- Tablas de Daimiel National Park Spain
- Tabon Scrubfowl
- Tabora Cisticola
- Tabora Grey Tit
- Tacarcuna Bush-Tanager
- Tacarcuna Bush Tanager
- Tacarcuna Chlorospingus
- Tacarcuna Tanager Finch
- Tacarcuna Tapaculo
- Tacarcuna Warbler
- Tacarcuna Wood-Quail
- Tacarcuna Wood Quail
- Tacazze Sunbird
- Taccocua
- Taccocua leschenaultii
- Taccocua leschenaultii sirkee
- Tachira Antpitta
- Tachira Emerald
- Tachira Hemispingus
- Tachornis
- Tachornis furcata
- Tachornis phoenicobia
- Tachornis squamata
- Tachuris
- Tachuris rubrigastra
- Tachybaptus
- Tachybaptus dominicus
- Tachybaptus dominicus brachyrhynchus
- Tachybaptus novaehollandiae
- Tachybaptus pelzelnii
- Tachybaptus ruficollis
- Tachybaptus ruficollis poggei
- Tachybaptus rufolavatus
- Tachycineta
- Tachycineta albilinea
- Tachycineta albiventer
- Tachycineta bicolor
- Tachycineta cyaneoviridis
- Tachycineta euchrysea
- Tachycineta leucopyga
- Tachycineta leucorrhoa
- Tachycineta meyeni
- Tachycineta stolzmanni
- Tachycineta thalassina
- Tachyeres
- Tachyeres brachypterus
- Tachyeres leucocephalus
- Tachyeres patachonicus
- Tachyeres pteneres
- Tachymarptis
- Tachymarptis aequatorialis
- Tachymarptis melba
- Tachyphonus
- Tachyphonus coronatus
- Tachyphonus cristatus
- Tachyphonus delatrii
- Tachyphonus luctuosus
- Tachyphonus luctuosus flaviventris
- Tachyphonus luctuosus panamensis
- Tachyphonus phoenicius
- Tachyphonus rufiventer
- Tachyphonus rufus
- Tachyphonus surinamus
- Tacumshin Lake
- Tacumshin Lake Ireland
- Taczanowski's Ground-Tyrant


