- Babax koslowi (Tibetan Babax)
- Babax koslowi koslowi
- Babax lanceolatus (Chinese Babax)
- Babax lanceolatus lanceolatus
- Babax lanceolatus woodi
- Babax waddelli (Giant Babax)
- Babax waddelli waddelli
- Baeolophus atricristatus (Black-crested Titmouse)
- Baeolophus atricristatus atricristatus
- Baeolophus atricristatus sennetti
- Baeolophus bicolor (Tufted Titmouse)
- Baeolophus inornatus (Oak Titmouse)
- Baeolophus inornatus affabilis
- Baeolophus inornatus cineraceus
- Baeolophus inornatus mohavensis
- Baeolophus ridgwayi (Juniper Titmouse)
- Baeolophus ridgwayi ridgwayi
- Baeolophus wollweberi (Bridled Titmouse)
- Baeolophus wollweberi phillipsi
- Baeolophus wollweberi wollweberi
- Baeopogon clamans (Sjostedt’s Greenbul)
- Baeopogon indicator (Honeyguide Greenbul)
- Baeopogon indicator leucurus (togoensis)
- Bangsia arcaei (Blue-and-gold Tanager)
- Bangsia arcaei arcaei
- Bangsia aureocincta (Gold-ringed Tanager)
- Bangsia edwardsi (Moss-backed Tanager)
- Bangsia melanochlamys (Black-and-gold Tanager)
- Bangsia rothschildi (Golden-chested Tanager)
- Basileuterus basilicus (Santa Marta Warbler)
- Basileuterus belli (Golden-browed Warbler)
- Basileuterus belli belli
- Basileuterus belli clarus
- Basileuterus belli scitulus
- Basileuterus bivittatus (Two-banded Warbler)
- Basileuterus bivittatus bivittatus
- Basileuterus bivittatus roraimae
- Basileuterus chrysogaster (Golden-bellied Warbler)
- Basileuterus chrysogaster chlorophrys (Golden-bellied Warbler (Choco))
- Basileuterus chrysogaster chrysogaster (Golden-bellied Warbler (Golden-bellied))
- Basileuterus cinereicollis (Gray-throated Warbler)
- Basileuterus cinereicollis cinereicollis
- Basileuterus conspicillatus (White-lored Warbler)
- Basileuterus coronatus (Russet-crowned Warbler)
- Basileuterus coronatus castaneiceps
- Basileuterus coronatus chapmani
- Basileuterus coronatus coronatus
- Basileuterus coronatus elatus
- Basileuterus coronatus inaequalis
- Basileuterus coronatus notius
- Basileuterus coronatus orientalis
- Basileuterus coronatus regulus
- Basileuterus culicivorus (Golden-crowned Warbler)
- Basileuterus culicivorus auricapillus
- Basileuterus culicivorus azarae
- Basileuterus culicivorus cabanisi
- Basileuterus culicivorus culicivorus
- Basileuterus culicivorus flavescens
- Basileuterus culicivorus godmani
- Basileuterus culicivorus olivascens
- Basileuterus culicivorus viridescens
- Basileuterus flaveolus (Flavescent Warbler)
- Basileuterus flaveolus flaveolus
- Basileuterus flaveolus pallidirostris
- Basileuterus fraseri (Gray-and-gold Warbler)
- Basileuterus fraseri fraseri
- Basileuterus fraseri ochraceicrista
- Basileuterus griseiceps (Gray-headed Warbler)
- Basileuterus hypoleucus (White-bellied Warbler)
- Basileuterus ignotus (Pirre Warbler)
- Basileuterus leucoblepharus (White-browed Warbler)
- Basileuterus leucophrys (White-striped Warbler)
- Basileuterus luteoviridis (Citrine Warbler)
- Basileuterus luteoviridis euophrys
- Basileuterus luteoviridis luteoviridis
- Basileuterus luteoviridis richardsoni
- Basileuterus luteoviridis striaticeps
- Basileuterus melanogenys (Black-cheeked Warbler)
- Basileuterus melanogenys bensoni
- Basileuterus melanogenys melanogenys
- Basileuterus nigrocristatus (Black-crested Warbler)
- Basileuterus rufifrons (Rufous-capped Warbler)
- Basileuterus rufifrons [delattrii Group] (Rufous-capped Warbler (Chestnut-capped))
- Basileuterus rufifrons [rufifrons Group] (Rufous-capped Warbler (North Mexico))
- Basileuterus rufifrons caudatus
- Basileuterus rufifrons delattrii
- Basileuterus rufifrons dugesi
- Basileuterus rufifrons jouyi
- Basileuterus rufifrons mesochrysus
- Basileuterus rufifrons rufifrons
- Basileuterus rufifrons salvini (Rufous-capped Warbler (Salvin’s))
- Basileuterus signatus (Pale-legged Warbler)
- Basileuterus signatus flavovirens
- Basileuterus signatus signatus
- Basileuterus trifasciatus (Three-banded Warbler)
- Basileuterus trifasciatus trifasciatus
- Basileuterus tristriatus (Three-striped Warbler)
- Basileuterus tristriatus auricularis
- Basileuterus tristriatus meridanus
- Basileuterus tristriatus pariae
- Basileuterus tristriatus tacarcunae
- Basileuterus tristriatus tristriatus
- Basilornis celebensis (Sulawesi Myna)
- Basilornis corythaix (Long-crested Myna)
- Basilornis galeatus (Helmeted Myna)
- Basilornis mirandus (Apo Myna)
- Batara cinerea (Giant Antshrike)
- Batara cinerea argentina
- Batara cinerea cinerea
- Batara cinerea excubitor
- Bathmocercus cerviniventris (Black-capped Rufous-Warbler)
- Bathmocercus rufus (Black-faced Rufous-Warbler)
- Bathmocercus rufus rufus
- Bathmocercus rufus vulpinus (jacksoni)
- Bathmocercus winifredae (Mrs. Moreau’s Warbler)
- Batis capensis (Cape Batis)
- Batis capensis capensis
- Batis capensis dimorpha
- Batis capensis erythrophthalma
- Batis capensis hollidayi
- Batis capensis kennedyi
- Batis capensis reichenowi
- Batis capensis sola
- Batis diops (Ruwenzori Batis)
- Batis fratrum (Woodward’s Batis)
- Batis ituriensis (Ituri Batis)
- Batis margaritae (Boulton’s Batis)
- Batis margaritae margaritae
- Batis minima (Verreaux’s Batis)
- Batis minor (Black-headed Batis)
- Batis minor minor
- Batis minor suahelicus
- Batis minulla (Angola Batis)
- Batis mixta (Short-tailed Batis)
- Batis mixta mixta
- Batis mixta ultima
- Batis molitor (Chinspot Batis)
- Batis molitor molitor
- Batis molitor palliditergum
- Batis molitor pintoi
- Batis molitor puella
- Batis occulta (West African Batis)
- Batis orientalis (Gray-headed Batis)
- Batis orientalis bella (somaliensis)
- Batis orientalis lynesi
- Batis orientalis orientalis
- Batis perkeo (Pygmy Batis)
- Batis poensis (Fernando Po Batis)
- Batis pririt (Pririt Batis)
- Batis pririt affinis
- Batis pririt pririt
- Batis senegalensis (Senegal Batis)
- Batis soror (Pale Batis)
- Berlepschia rikeri (Point-tailed Palmcreeper)
- Bias musicus (Black-and-white Shrike-flycatcher)
- Bias musicus changamwensis
- Biatas nigropectus (White-bearded Antshrike)
- Bleda canicapillus (Gray-headed Bristlebill)
- Bleda canicapillus canicapillus
- Bleda eximius (Green-tailed Bristlebill)
- Bleda notatus (Lesser Bristlebill)
- Bleda notatus notatus
- Bleda notatus ugandae
- Bleda syndactylus (Common Bristlebill)
- Bleda syndactylus syndactylus (multicolor)
- Bleda syndactylus woosnami
- Bombycilla cedrorum (Cedar Waxwing)
- Bombycilla garrulus (Bohemian Waxwing)
- Bombycilla garrulus centralasiae
- Bombycilla garrulus garrulus
- Bombycilla garrulus pallidiceps
- Bombycilla japonica (Japanese Waxwing)
- Brachycope anomala (Bob-tailed Weaver)
- Brachypteryx hyperythra (Rusty-bellied Shortwing)
- Brachypteryx leucophrys (Lesser Shortwing)
- Brachypteryx leucophrys carolinae
- Brachypteryx leucophrys langbianensis
- Brachypteryx leucophrys leucophrys
- Brachypteryx leucophrys nipalensis
- Brachypteryx major (White-bellied Shortwing)
- Brachypteryx major albiventris
- Brachypteryx major major
- Brachypteryx montana (White-browed Shortwing)
- Brachypteryx montana andersoni
- Brachypteryx montana brunneiceps
- Brachypteryx montana cruralis
- Brachypteryx montana floris
- Brachypteryx montana goodfellowi
- Brachypteryx montana mindanensis
- Brachypteryx montana mindorensis
- Brachypteryx montana montana
- Brachypteryx montana poliogyna
- Brachypteryx montana saturata
- Brachypteryx montana sinensis
- Brachypteryx stellata (Gould’s Shortwing)
- Brachypteryx stellata fusca
- Brachypteryx stellata stellata
- Bradornis infuscatus (Chat Flycatcher)
- Bradornis infuscatus infuscatus
- Bradornis infuscatus placidus
- Bradornis infuscatus seimundi
- Bradornis mariquensis (Mariqua Flycatcher)
- Bradornis mariquensis mariquensis
- Bradornis microrhynchus (African Gray Flycatcher)
- Bradornis microrhynchus microrhynchus
- Bradornis microrhynchus neumanni
- Bradornis microrhynchus pumilus
- Bradornis pallidus (Pale Flycatcher)
- Bradornis pallidus bafirawari
- Bradornis pallidus erlangeri
- Bradornis pallidus griseus
- Bradornis pallidus modestus (nigeriae)
- Bradornis pallidus murinus
- Bradornis pallidus pallidus
- Bradornis pallidus parvus
- Bradornis pallidus sibilans
- Bradornis pallidus subalaris
- Bradypterus accentor (Friendly Bush-Warbler)
- Bradypterus alfredi (Bamboo Scrub-Warbler)
- Bradypterus alfredi alfredi
- Bradypterus alfredi kungwensis
- Bradypterus alishanensis (Taiwan Bush-Warbler)
- Bradypterus baboecala (African Bush-Warbler)
- Bradypterus baboecala abyssinicus
- Bradypterus baboecala baboecala
- Bradypterus baboecala centralis
- Bradypterus baboecala elgonensis
- Bradypterus baboecala transvaalensis
- Bradypterus bangwaensis (Bangwa Scrub-Warbler)
- Bradypterus barratti (African Scrub-Warbler)
- Bradypterus barratti barratti
- Bradypterus carpalis (White-winged Scrub-Warbler)
- Bradypterus castaneus (Chestnut-backed Bush-Warbler)
- Bradypterus castaneus castaneus
- Bradypterus castaneus musculus
- Bradypterus caudatus (Long-tailed Bush-Warbler)
- Bradypterus caudatus caudatus
- Bradypterus caudatus unicolor
- Bradypterus cinnamomeus (Cinnamon Bracken-Warbler)
- Bradypterus cinnamomeus cavei
- Bradypterus cinnamomeus cinnamomeus
- Bradypterus cinnamomeus nyassae
- Bradypterus grandis (Ja River Scrub-Warbler)
- Bradypterus graueri (Grauer’s Scrub-Warbler)
- Bradypterus lopezi (Cameroon Scrub-Warbler)
- Bradypterus lopezi barakae
- Bradypterus lopezi camerunensis
- Bradypterus lopezi granti
- Bradypterus lopezi lopezi
- Bradypterus lopezi mariae
- Bradypterus lopezi usambarae
- Bradypterus luteoventris (Brown Bush-Warbler)
- Bradypterus luteoventris luteoventris
- Bradypterus major (Long-billed Bush-Warbler)
- Bradypterus major major
- Bradypterus palliseri (Ceylon Bush-Warbler)
- Bradypterus seebohmi (Russet Bush-Warbler)
- Bradypterus seebohmi idoneus
- Bradypterus seebohmi melanorhynchus
- Bradypterus seebohmi montis
- Bradypterus seebohmi seebohmi
- Bradypterus seebohmi timoriensis
- Bradypterus sylvaticus (Knysna Scrub-Warbler)
- Bradypterus sylvaticus sylvaticus
- Bradypterus tacsanowskius (Chinese Bush-Warbler)
- Bradypterus thoracicus (Spotted Bush-Warbler)
- Bradypterus thoracicus davidi
- Bradypterus thoracicus przevalskii
- Bradypterus thoracicus suschkini
- Bradypterus thoracicus thoracicus
- Bradypterus victorini (Victorin’s Scrub-Warbler)
- Bubalornis albirostris (White-billed Buffalo-Weaver)
- Bubalornis niger (Red-billed Buffalo-Weaver)
- Bubalornis niger intermedius
- Bubalornis niger niger (militaris)
- Bucanetes githagineus (Trumpeter Finch)
- Bucanetes githagineus amantum
- Bucanetes githagineus crassirostris
- Bucanetes githagineus githagineus
- Bucanetes githagineus zedlitzi
- Bucanetes mongolicus (Mongolian Finch)
- Buettikoferella bivittata (Buff-banded Bushbird)
- Buphagus africanus (Yellow-billed Oxpecker)
- Buphagus africanus africanus
- Buphagus erythrorhynchus (Red-billed Oxpecker)
- Buthraupis aureodorsalis (Golden-backed Mountain-Tanager)
- Buthraupis eximia (Black-chested Mountain-Tanager)
- Buthraupis eximia chloronota
- Buthraupis eximia eximia
- Buthraupis eximia zimmeri
- Buthraupis montana (Hooded Mountain-Tanager)
- Buthraupis montana cucullata
- Buthraupis montana gigas
- Buthraupis montana montana
- Buthraupis montana saturata
- Buthraupis wetmorei (Masked Mountain-Tanager)
- Cacicus cela (Yellow-rumped Cacique)
- Cacicus cela cela (Yellow-rumped Cacique (Amazonian))
- Cacicus cela flavicrissus
- Cacicus cela vitellinus
- Cacicus chrysonotus (Mountain Cacique)
- Cacicus chrysonotus chrysonotus (Mountain Cacique (Bolivian))
- Cacicus chrysonotus leucoramphus (peruvianus)
- Cacicus chrysonotus peruvianus
- Cacicus chrysopterus (Golden-winged Cacique)
- Cacicus haemorrhous (Red-rumped Cacique)
- Cacicus haemorrhous affinis
- Cacicus haemorrhous haemorrhous
- Cacicus koepckeae (Selva Cacique)
- Cacicus melanicterus (Yellow-winged Cacique)
- Cacicus sclateri (Ecuadorian Cacique)
- Cacicus solitarius (Solitary Cacique)
- Cacicus uropygialis (Scarlet-rumped Cacique)
- Cacicus uropygialis microrhynchus
- Cacicus uropygialis pacificus
- Cacicus uropygialis uropygialis
- Calamanthus campestris (Rufous Fieldwren)
- Calamanthus campestris campestris
- Calamanthus campestris isabellinus
- Calamanthus campestris montanellus
- Calamanthus campestris rubiginosus
- Calamanthus fuliginosus (Striated Fieldwren)
- Calamanthus fuliginosus albiloris
- Calamanthus fuliginosus diemenensis
- Calamanthus fuliginosus fuliginosus
- Calamonastes fasciolatus (Barred Wren-Warbler)
- Calamonastes fasciolatus fasciolatus
- Calamonastes simplex (Gray Wren-Warbler)
- Calamonastes undosus (Miombo Wren-Warbler)
- Calamonastes undosus cinereus
- Calamonastes undosus katangae
- Calamonastes undosus olivascens
- Calamonastes undosus pintoi
- Calamonastes undosus undosus
- Calamospiza melanocorys (Lark Bunting)
- Calandrella acutirostris (Hume’s Lark)
- Calandrella acutirostris acutirostris
- Calandrella acutirostris tibetana
- Calandrella blanfordi (Blanford’s Lark)
- Calandrella blanfordi blanfordi
- Calandrella brachydactyla (Greater Short-toed Lark)
- Calandrella brachydactyla artemisiana
- Calandrella brachydactyla brachydactyla
- Calandrella brachydactyla dukhunensis
- Calandrella brachydactyla hermonensis
- Calandrella brachydactyla hungarica
- Calandrella brachydactyla longipennis (orientalis)
- Calandrella brachydactyla rubiginosa
- Calandrella brachydactyla woltersi
- Calandrella cinerea (Red-capped Lark)
- Calandrella cinerea saturatior
- Calandrella cinerea williamsi
- Calandrella erlangeri (Erlanger’s Lark)
- Calandrella raytal (Sand Lark)
- Calandrella raytal adamsi
- Calandrella raytal raytal
- Calandrella rufescens (Lesser Short-toed Lark)
- Calandrella rufescens apetzii
- Calandrella rufescens cheleensis (obscura)
- Calandrella rufescens heinei
- Calandrella rufescens leucophaea
- Calandrella rufescens minor
- Calandrella rufescens nicolli
- Calandrella rufescens niethammeri
- Calandrella rufescens polatzeki
- Calandrella rufescens pseudobaetica
- Calandrella rufescens rufescens
- Calandrella rufescens seebohmi
- Calandrella rufescens stegmanni
- Calandrella somalica (Somali Short-toed Lark)
- Calandrella somalica athensis
- Calandrella somalica megaensis
- Calandrella somalica somalica
- Calcarius lapponicus (Lapland Longspur)
- Calcarius lapponicus alascensis
- Calcarius lapponicus coloratus
- Calcarius lapponicus lapponicus
- Calcarius mccownii (McCown’s Longspur)
- Calcarius ornatus (Chestnut-collared Longspur)
- Calcarius pictus (Smith’s Longspur)
- Calendulauda africanoides (Fawn-colored Lark)
- Calendulauda africanoides vincenti
- Calendulauda albescens (Karoo Lark)
- Calendulauda albescens albescens
- Calendulauda albescens guttata
- Calendulauda alopex (Foxy Lark)
- Calendulauda alopex alopex
- Calendulauda barlowi (Barlow’s Lark)
- Calendulauda barlowi barlowi
- Calendulauda burra (Ferruginous Lark)
- Calendulauda erythrochlamys (Dune Lark)
- Calendulauda poecilosterna (Pink-breasted Lark)
- Calendulauda sabota (Sabota Lark)
- Calendulauda sabota ansorgei
- Calendulauda sabota bradfieldi
- Calendulauda sabota herero
- Calendulauda sabota naevia
- Calendulauda sabota sabota
- Calicalicus madagascariensis (Red-tailed Vanga)
- Calicalicus rufocarpalis (Red-shouldered Vanga)
- Callacanthis burtoni (Spectacled Finch)
- Callaeas cinereus (Kokako)
- Callaeas cinereus cinereus (Kokako (South Island))
- Callaeas cinereus wilsoni (Kokako (North Island))
- Calochaetes coccineus (Vermilion Tanager)
- Calocitta colliei (Black-throated Magpie-Jay)
- Calocitta formosa (White-throated Magpie-Jay)
- Calocitta formosa azurea
- Calocitta formosa formosa
- Calocitta formosa pompata
- Calyptocichla serina (Golden Greenbul)
- Calyptomena hosii (Hose’s Broadbill)
- Calyptomena viridis (Green Broadbill)
- Calyptomena viridis caudacuta
- Calyptomena viridis viridis
- Calyptomena whiteheadi (Whitehead’s Broadbill)
- Calyptophilus frugivorus (Eastern Chat-Tanager)
- Calyptophilus frugivorus abbotti
- Calyptophilus frugivorus frugivorus
- Calyptophilus tertius (Western Chat-Tanager)
- Calyptura cristata (Kinglet Calyptura)
- Camarhynchus heliobates (Mangrove Finch)
- Camarhynchus pallidus (Woodpecker Finch)
- Camarhynchus pallidus pallidus
- Camarhynchus pallidus productus
- Camarhynchus pallidus striatipectus
- Camarhynchus parvulus (Small Tree-Finch)
- Camarhynchus parvulus parvulus
- Camarhynchus parvulus salvini
- Camarhynchus pauper (Medium Tree-Finch)
- Camarhynchus psittacula (Large Tree-Finch)
- Camarhynchus psittacula affinis
- Camarhynchus psittacula psittacula
- Camaroptera brachyura (Green-backed Camaroptera)
- Camaroptera brachyura abessinica
- Camaroptera brachyura brachyura
- Camaroptera brachyura brevicaudata
- Camaroptera brachyura constans
- Camaroptera brachyura erlangeri (albiventris)
- Camaroptera brachyura griseigula
- Camaroptera brachyura harterti
- Camaroptera brachyura insulata
- Camaroptera brachyura pileata
- Camaroptera brachyura tincta
- Camaroptera chloronota (Olive-green Camaroptera)
- Camaroptera chloronota chloronota
- Camaroptera chloronota granti
- Camaroptera chloronota toroensis
- Camaroptera superciliaris (Yellow-browed Camaroptera)
- Campephaga flava (Black Cuckoo-shrike)
- Campephaga lobata (Ghana Cuckoo-shrike)
- Campephaga oriolina (Oriole Cuckoo-shrike)
- Campephaga petiti (Petit’s Cuckoo-shrike)
- Campephaga phoenicea (Red-shouldered Cuckoo-shrike)
- Campephaga quiscalina (Purple-throated Cuckoo-shrike)
- Campephaga quiscalina martini
- Campephaga quiscalina quiscalina
- Campochaera sloetii (Golden Cuckoo-shrike)
- Campochaera sloetii flaviceps
- Campochaera sloetii sloetii
- Camptostoma imberbe (Northern Beardless-Tyrannulet)
- Camptostoma obsoletum (Southern Beardless-Tyrannulet)
- Camptostoma obsoletum [obsoletum Group] (Southern Beardless-Tyrannulet (Southern))
- Camptostoma obsoletum [pusillus Group] (Southern Beardless-Tyrannulet (Northern))
- Camptostoma obsoletum bolivianum
- Camptostoma obsoletum cinerascens
- Camptostoma obsoletum obsoletum
- Camptostoma obsoletum olivaceum
- Camptostoma obsoletum sclateri
- Campylorhamphus falcularius (Black-billed Scythebill)
- Campylorhamphus procurvoides (Curve-billed Scythebill)
- Campylorhamphus procurvoides procurvoides
- Campylorhamphus pucherani (Greater Scythebill)
- Campylorhamphus pusillus (Brown-billed Scythebill)
- Campylorhamphus pusillus borealis
- Campylorhamphus pusillus olivaceus
- Campylorhamphus pusillus pusillus
- Campylorhamphus trochilirostris (Red-billed Scythebill)
- Campylorhamphus trochilirostris brevipennis
- Campylorhamphus trochilirostris hellmayri
- Campylorhamphus trochilirostris lafresnayanus
- Campylorhamphus trochilirostris napensis
- Campylorhamphus trochilirostris notabilis
- Campylorhamphus trochilirostris snethlageae
- Campylorhamphus trochilirostris thoracicus
- Campylorhamphus trochilirostris trochilirostris
- Campylorhamphus trochilirostris venezuelensis
- Campylorhynchus albobrunneus (White-headed Wren)
- Campylorhynchus albobrunneus albobrunneus
- Campylorhynchus albobrunneus harterti
- Campylorhynchus brunneicapillus (Cactus Wren)
- Campylorhynchus brunneicapillus affinis
- Campylorhynchus brunneicapillus anthonyi (couesi)
- Campylorhynchus brunneicapillus brunneicapillus
- Campylorhynchus brunneicapillus bryanti
- Campylorhynchus brunneicapillus guttatus
- Campylorhynchus brunneicapillus purus
- Campylorhynchus brunneicapillus sandiegensis
- Campylorhynchus brunneicapillus seri
- Campylorhynchus chiapensis (Giant Wren)