- Schoeniparus dubius
- Schoeniparus klossi
- Schoeniparus rufogularis
- Schoeniparus variegaticeps
- Schouteden's Swift
- Schoutedenapus
- Schoutedenapus myoptilus
- Schoutedenapus schoutedeni
- Schouwen-duiveland
- Schrenck's Bittern
- Schrenck's Little Bittern
- Schwartz's Antthrush
- Sciaphylax
- Sciaphylax castanea
- Sciaphylax hemimelaena
- Scilly
- Scilly Isles
- Scimitar-billed Woodcreeper
- Scimitar-winged Cotinga
- Scimitar-winged Piha
- Scintillant Hummingbird
- Scissirostrum
- Scissirostrum dubium
- Scissor-billed Starling
- Scissor-tailed Flycatcher
- Scissor-tailed Hummingbird
- Scissor-tailed Kite
- Scissor-tailed Nightjar
- Sciurus vulgaris
- Sclater's Antwren
- Sclater's Crowned-pigeon
- Sclater's Crowned Pigeon
- Sclater's Lark
- Sclater's Monal
- Sclater's Myzomela
- Sclater's Nightingale-Thrush
- Sclater's Nightingale Thrush
- Sclater's Tyrannulet
- Sclater's Whistler
- Sclater's Woodswallow
- Sclater's Wren
- Sclateria
- Sclateria naevia
- Scleroptila afra
- Scleroptila africanus
- Scleroptila finschi
- Scleroptila gutturalis
- Scleroptila levaillantii
- Scleroptila levaillantoides
- Scleroptila psilolaema
- Scleroptila psilolaemus
- Scleroptila shelleyi
- Scleroptila streptophora
- Scleroptila streptophorus
- Sclerurus
- Sclerurus albigularis
- Sclerurus caudacutus
- Sclerurus guatemalensis
- Sclerurus mexicanus
- Sclerurus obscurior
- Sclerurus rufigularis
- Sclerurus scansor
- Sclerurus scansor cearensis
- Scolopacidae
- Scolopax
- Scolopax bukidnonensis
- Scolopax celebensis
- Scolopax minor
- Scolopax mira
- Scolopax rochussenii
- Scolopax rosenbergii
- Scolopax rusticola
- Scolopax saturata
- Scopidae
- Scopoli's Shearwater
- Scopoli’s Shearwater
- Scops Owl
- Scopus
- Scopus umbretta
- Scoter
- Scoters
- Scotland
- Scotocerca
- Scotocerca inquieta
- Scotocercidae
- Scotopelia
- Scotopelia bouvieri
- Scotopelia peli
- Scotopelia ussheri
- Scott's Oriole
- Scottish Crossbill
- Screamer
- Screamers
- Screaming Cowbird
- Screaming Piha
- Screech owl
- Scribble-tailed Canastero
- Scripps's Murrelet
- Scripps’s Murrelet
- Scrub-Jay
- Scrub Antpitta
- Scrub Babbler
- Scrub Blackbird
- Scrub Currawong
- Scrub Euphonia
- Scrub Greenlet
- Scrub Honeyeater
- Scrub Jay
- Scrub Mountain-honeyeater
- Scrub Mountain-meliphaga
- Scrub Mountain Honeyeater
- Scrub Mountain Meliphaga
- Scrub Nightjar
- Scrub Sparrow
- Scrub Tanager
- Scrub Warbler
- Scrub White-eared Honeyeater
- Scrub White-eared Meliphaga
- Scrub White-eyed Honeyeater
- Scrub White-marked Honeyeater
- Scrub White-marked Meliphaga
- Scrubfowl
- Scrubfowls
- Scrubhen
- Scrubquail
- Scrubtit
- Sculthorpe Moor
- Scytalopus
- Scytalopus acutirostris
- Scytalopus affinis
- Scytalopus altirostris
- Scytalopus alvarezlopezi
- Scytalopus argentifrons
- Scytalopus atratus
- Scytalopus bolivianus
- Scytalopus canus
- Scytalopus caracae
- Scytalopus chiriquensis
- Scytalopus chocoensis
- Scytalopus diamantinensis
- Scytalopus femoralis
- Scytalopus fuscicauda
- Scytalopus fuscus
- Scytalopus gettyae
- Scytalopus gonzagai
- Scytalopus griseicollis
- Scytalopus indigoticus
- Scytalopus infasciatus
- Scytalopus iraiensis
- Scytalopus latebricola
- Scytalopus latrans
- Scytalopus macropus
- Scytalopus magellanicus
- Scytalopus meridanus
- Scytalopus micropterus
- Scytalopus nigricans
- Scytalopus notorius
- Scytalopus novacapitalis
- Scytalopus opacus
- Scytalopus pachecoi
- Scytalopus panamensis
- Scytalopus parkeri
- Scytalopus parvirostris
- Scytalopus perijanus
- Scytalopus petrophilus
- Scytalopus psychopompus
- Scytalopus robbinsi
- Scytalopus rodriguezi
- Scytalopus sanctaemartae
- Scytalopus schulenbergi
- Scytalopus simonsi
- Scytalopus speluncae
- Scytalopus spillmani
- Scytalopus spillmanni
- Scytalopus stilesi
- Scytalopus superciliaris
- Scytalopus unicolor
- Scytalopus urubambae
- Scytalopus vicinior
- Scytalopus zimmeri
- Scythrops
- Scythrops novaehollandiae
- Sea-Eagle
- Sea-Eagles
- Sea Eagle
- Sea Eagles
- Seaboard Flycatcher
- Seaford Head
- Seaside Cinclodes
- Seaside Sparrow
- Secovlje Salina Nature Park
- Secovlje Salina Nature Park(Slovenian coast)
- Secretary-bird
- Secretary Bird
- Secretarybird
- Sedge Warbler
- Sedge Wren
- See-see Partridge
- Seebohm's Wheatear
- Seetaucherstrecke
- Seicercus
- Seicercus affinis
- Seicercus amoenus
- Seicercus borealis
- Seicercus borealoides
- Seicercus budongoensis
- Seicercus burkii
- Seicercus calciatilis
- Seicercus cantator
- Seicercus castaniceps
- Seicercus cebuensis
- Seicercus claudiae
- Seicercus coronatus
- Seicercus emeiensis
- Seicercus examinandus
- Seicercus goodsoni
- Seicercus grammiceps
- Seicercus hainanus
- Seicercus herberti
- Seicercus ijimae
- Seicercus laetus
- Seicercus laurae
- Seicercus maforensis
- Seicercus magnirostris
- Seicercus makirensis
- Seicercus montis
- Seicercus montis montis
- Seicercus nitidus
- Seicercus occipitalis
- Seicercus ogilviegranti
- Seicercus olivaceus
- Seicercus omeiensis
- Seicercus plumbeitarsus
- Seicercus poliogenys
- Seicercus presbytes
- Seicercus reguloides
- Seicercus ricketti
- Seicercus ruficapilla
- Seicercus sarasinorum
- Seicercus soror
- Seicercus tenellipes
- Seicercus tephrocephalus
- Seicercus trivirgatus
- Seicercus trochiloides
- Seicercus umbrovirens
- Seicercus valentini
- Seicercus whistleri
- Seicercus xanthodryas
- Seicercus xanthoschistos
- Seicercus xanthoschistos albosuperciliaris
- Seimund's Sunbird
- Seiurus
- Seiurus aurocapilla
- Seiurus aurocapillus
- Seiurus motacilla
- Seiurus noveboracensis
- Sekororo
- Selasphorus
- Selasphorus Sasin
- Selasphorus ardens
- Selasphorus calliope
- Selasphorus ellioti ellioti
- Selasphorus flammula
- Selasphorus flammula torridus
- Selasphorus heloisa
- Selasphorus platycercus
- Selasphorus rufus
- Selasphorus sasin
- Selasphorus sasin sasin
- Selasphorus scintilla
- Selenidera
- Selenidera culik
- Selenidera gouldii
- Selenidera maculirostris
- Selenidera nattereri
- Selenidera piperivora
- Selenidera reinwardtii
- Selenidera spectabilis
- Seleucidis
- Seleucidis melanoleuca
- Seleucidis melanoleucus
- Selsey Bill
- Selsey Bill(West Sussex)
- Selva Cacique
- Semeioptera wallacei
- Semi-collared Flycatcher
- Semi-palmated Sandpiper
- Semicollared Flycatcher
- Semicollared Hawk
- Semicollared Puffbird
- Semioptera
- Semioptera Wallacii
- Semioptera wallacii
- Semipalmated Plover
- Semipalmated Sandpiper
- Semiplumbeous Hawk
- Semnornis
- Semnornis frantzii
- Semnornis ramphastinus
- Semnornithidae
- Semper's Warbler
- Senegal
- Senegal Batis
- Senegal Canary
- Senegal Coucal
- Senegal Dove
- Senegal Eremomela
- Senegal Lapwing
- Senegal Parrot
- Senegal Plover
- Senegal Thick-knee
- Senegal Wattled Plover
- Senegambia
- Senji
- Sennar Penduline-Tit
- Sennar Penduline Tit
- Senne Fishponds
- Senne Fishponds Slovakia
- Sentinel Rock-Thrush
- Sentinel Rock Thrush
- Sephanoides
- Sephanoides fernandensis
- Sephanoides sephaniodes
- Sephanoides sephanoides
- Sepia-brown Wren
- Sepia-capped Flycatcher
- Sepia-capped Leptopogon
- Sept Iles Nature Reserve
- Sept Iles Nature Reserve France
- Seram
- Seram Cuckoo-shrike
- Seram Cuckooshrike
- Seram Dwarf-Kingfisher
- Seram Dwarf Kingfisher
- Seram Friarbird
- Seram Golden-Bulbul
- Seram Golden Bulbul
- Seram Honeyeater
- Seram Imperial-Pigeon
- Seram Imperial Pigeon
- Seram King Starling
- Seram Masked-Owl
- Seram Masked Owl
- Seram Mountain-Pigeon
- Seram Mountain Pigeon


