- Strawberry Finch
- Streak-backed Antshrike
- Streak-backed Canastero
- Streak-backed Oriole
- Streak-backed Tit-Spinetail
- Streak-breasted Bulbul
- Streak-breasted Fantail
- Streak-breasted Honeyeater
- Streak-breasted Jungle-Flycatcher
- Streak-breasted Jungle Flycatcher
- Streak-breasted Scimitar-Babbler
- Streak-breasted Scimitar Babbler
- Streak-breasted Treehunter
- Streak-breasted Woodpecker
- Streak-breasted Wren-Babbler
- Streak-breasted Wren Babbler
- Streak-capped Antwren
- Streak-capped Honeyeater
- Streak-capped Spinetail
- Streak-capped Treehunter
- Streak-chested Antpitta
- Streak-chested or Spectacled Antpitta
- Streak-crowned Ant Vireo
- Streak-crowned Antvireo
- Streak-eared Bulbul
- Streak-fronted Thornbird
- Streak-headed Antbird
- Streak-headed Honeyeater
- Streak-headed Ibon
- Streak-headed Mannikin
- Streak-headed Munia
- Streak-headed White-eye
- Streak-headed Woodcreeper
- Streak-necked Flycatcher
- Streak-throated Barwing
- Streak-throated Bush-Tyrant
- Streak-throated Bush Tyrant
- Streak-throated Canastero
- Streak-throated Fulvetta
- Streak-throated Green Woodpecker
- Streak-throated Hermit
- Streak-throated Swallow
- Streak-throated Tit-babbler
- Streak-throated Woodpecker
- Streak-throated Wren-Babbler
- Streak-throated Wren Babbler
- Streak Capped Treehunter
- Streaked Barwing
- Streaked Berrypecker
- Streaked Bowerbird
- Streaked Bulbul
- Streaked Fan-tailed Warbler
- Streaked Fantail
- Streaked Fantail Warbler
- Streaked Flycatcher
- Streaked Ground-Babbler
- Streaked Ground Babbler
- Streaked Hill-babbler
- Streaked Laughing-thrush
- Streaked Laughing Thrush
- Streaked Laughingthrush
- Streaked Lory
- Streaked Reed-Warbler
- Streaked Reed Warbler
- Streaked Rock-Sparrow
- Streaked Rock Sparrow
- Streaked Rosefinch
- Streaked Saltator
- Streaked Scrub-Warbler
- Streaked Scrub Warbler
- Streaked Shearwater
- Streaked Spiderhunter
- Streaked Tit-Spinetail
- Streaked Tit Spinetail
- Streaked Tuftedcheek
- Streaked Weaver
- Streaked Wren-Babbler
- Streaked Wren Babbler
- Streaked Xenops
- Streaky-breasted Fantail
- Streaky-breasted Flufftail
- Streaky-breasted Honeyeater
- Streaky-breasted Jungle-Flycatcher
- Streaky-breasted Jungle Flycatcher
- Streaky-breasted Spiderhunter
- Streaky-headed Canary
- Streaky-headed Seedeater
- Streaky-headed White-eye
- Streaky Canary
- Streaky Seedeater
- Streamer-tailed Tyrant
- Streamertail
- Strepera
- Strepera fuliginosa
- Strepera graculina
- Strepera versicolor
- Strepera versicolor intermedia
- Streptocitta
- Streptocitta albertinae
- Streptocitta albicollis
- Streptopelia
- Streptopelia bitorquata
- Streptopelia capicola
- Streptopelia chinensis
- Streptopelia chinensis suratensis
- Streptopelia decaocto
- Streptopelia decaocto decaocto
- Streptopelia decipiens
- Streptopelia dusumieri
- Streptopelia hypopyrrha
- Streptopelia lugens
- Streptopelia mayeri
- Streptopelia orientalis
- Streptopelia orientalis orientalis
- Streptopelia picturata
- Streptopelia reichenowi
- Streptopelia risoria
- Streptopelia roseogrisea
- Streptopelia semitorquata
- Streptopelia senegalensis
- Streptopelia tranquebarica
- Streptopelia tranquebarica humilis
- Streptopelia tranquebarica tranquebarica
- Streptopelia turtur
- Streptopelia vinacea
- Streptoprocne
- Streptoprocne biscutata
- Streptoprocne rutila
- Streptoprocne semicollaris
- Streptoprocne zonaris
- Stresemann's Bristlefront
- Stresemann's Bush-Crow
- Stresemann's Bush-crow
- Stresemann's Bush Crow
- Stresemann's Bushcrow
- Stresemann's Rosefinch
- Stresemannia
- Stresemannia bougainvillei
- Striated Antbird
- Striated Antthrush
- Striated Babbler
- Striated Berrypecker
- Striated Bulbul
- Striated Calamanthus
- Striated Caracara
- Striated Earthcreeper
- Striated Fieldwren
- Striated Fieldwren or Calamanthus
- Striated Grassbird
- Striated Grasswren
- Striated Heron
- Striated Laughing-thrush
- Striated Laughingthrush
- Striated Lorikeet
- Striated Pardalote
- Striated Prinia
- Striated Scops-Owl
- Striated Scops Owl
- Striated Sittella
- Striated Softtail
- Striated Starling
- Striated Swallow
- Striated Thornbill
- Striated Tit-Babbler
- Striated Tit Babbler
- Striated Wren-Babbler
- Striated Wren Babbler
- Striated Yuhina
- Strickland's Babbler
- Strickland's Jay
- Strickland's Woodpecker
- Strigidae
- Strigiformes
- Strigopidae
- Strigops
- Strigops habroptilus
- Striolated Bunting
- Striolated Puffbird
- Striolated Tit-Spinetail
- Striolated Tit Spinetail
- Stripe-backed Antbird
- Stripe-backed Bittern
- Stripe-backed Wren
- Stripe-billed Aracari
- Stripe-breasted Rhabdornis
- Stripe-breasted Shrike-thrush
- Stripe-breasted Shrike Thrush
- Stripe-breasted Spinetail
- Stripe-breasted Starthroat
- Stripe-breasted Thrush
- 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 Greenbul
- Stripe-faced Wood-Quail
- Stripe-faced Wood Quail
- Stripe-faced wood-quail
- Stripe-headed Antpitta
- Stripe-headed Brush-Finch
- Stripe-headed Brush Finch
- Stripe-headed Brushfinch
- Stripe-headed Rhabdornis
- Stripe-headed Sparrow
- Stripe-headed Tanager
- Stripe-headed Tit-Babbler
- Stripe-headed Tit Babbler
- Stripe-necked Tody-Tyrant
- Stripe-necked Tody Tyrant
- Stripe-sided Rhabdornis
- Stripe-tailed Hummingbird
- Stripe-tailed Yellow-Finch
- Stripe-tailed Yellow Finch
- Stripe-throated Babbler
- Stripe-throated Bulbul
- Stripe-throated Hermit
- Stripe-throated Jery
- Stripe-throated Minla
- Stripe-throated Tit-Babbler
- Stripe-throated Tit Babbler
- Stripe-throated Wren
- Stripe-throated Yuhina
- Striped Babbler
- Striped Bowerbird
- Striped Buttonquail
- Striped Crake
- Striped Crested Cuckoo
- Striped Cuckoo
- Striped Flowerpecker
- Striped Flufftail
- Striped Honeyeater
- Striped Kingfisher
- Striped Laughing-thrush
- Striped Laughingthrush
- Striped Manakin
- Striped Owl
- Striped Pipit
- Striped Sparrow
- Striped Starling
- Striped Tiger
- Striped Tit-Babbler
- Striped Tit Babbler
- Striped Tree-Babbler
- Striped Treehunter
- Striped Woodcreeper
- Striped Woodhaunter
- Striped Woodpecker
- Striped Wren-Babbler
- Striped Wren Babbler
- Strix
- Strix albitarsis
- Strix albitarsus
- Strix aluco
- Strix bartelsi
- Strix butleri
- Strix chacoensis
- Strix davidi
- Strix fulvescens
- Strix hadorami
- Strix huhula
- Strix hylophila
- Strix leptogrammica
- Strix nebulosa
- Strix newarensis
- Strix nigrolineata
- Strix nivicola
- Strix nivicolum
- Strix occidentalis
- Strix occidentalis caurina
- Strix occidentalis lucida
- Strix ocellata
- Strix omanensis
- Strix rufipes
- Strix sartorii
- Strix seloputo
- Strix uralensis
- Strix uralensis japonica
- Strix varia
- Strix virgata
- Strix virgata centralis
- Strix woodfordii
- Strix woodfordii nuchalis
- Strong-billed Honeyeater
- Strong-billed Woodcreeper
- Strong Billed Woodcreeper
- Strophocincla
- Strophocincla cachinnans
- Strophocincla fairbanki
- Strophocincla imbricata
- Strophocincla lineata
- Strophocincla virgata
- Strumpshaw Fen
- Strumpshaw Fen RSPB Reserve
- Struthidea
- Struthidea cinerea
- Struthideidae
- Struthio
- Struthio camelus
- Struthio molybdophanes
- Struthionidae
- Struthioniformes
- Stub-tailed Antbird
- Stub-tailed Spadebill
- Stubble Quail
- Stubs
- Studen Kladenetz
- Studen Kladenetz Bulgaria
- Stuhlmann's Double-collared Sunbird
- Stuhlmann's Starling
- Stuhlmann's Sunbird
- Sturnella
- Sturnella Loyca
- Sturnella bellicosa
- Sturnella defilippii
- Sturnella lilianae
- Sturnella loyca
- Sturnella loyca falklandica
- Sturnella loyca loyca
- Sturnella magna
- Sturnella militaris
- Sturnella neglecta
- Sturnella superciliaris
- Sturnia
- Sturnia albofrontata
- Sturnia blythii
- Sturnia erythropygia
- Sturnia malabarica
- Sturnia pagodarum
- Sturnia philippensis
- Sturnia sinensis
- Sturnia sturnina
- Sturnidae
- Sturnornis
- Sturnornis albofrontatus
- Sturnus
- Sturnus albofrontatus
- Sturnus blythii
- Sturnus burmannicus
- Sturnus cineraceus
- Sturnus contra
- Sturnus erythropygius


