Proposed splits for which (full) information is currently lacking to me

At present, these are 176 taxa of which I have heard that they have been or will be proposed to be split, yet enough details are lacking to include them in the main lists.  This is why I cannot possibly guarantee the correctness of the information below.  The list is here included as an appetizer and also as a request for further information.  It does include a number of taxa that have been split in some field guide for a region, but for which I have no other reference.  Species with a trailing ampersand character after their vernacular name are considered extinct.

Puna Rhea     Rhea tarapacensis
split from: Rhea pennata

King Island Emu@     Dromaius ater
split from: Dromaius novaehollandiae

Tokoeka     Apteryx mantelli
split from: Apteryx australis

Biak/Geelvink Megapode     Megapodius geelvinkianus
split from: Megapodius freycinet

Kirk's Francolin     Peliperdix rovuma
split from: Peliperdix sephaena

Malayan Partridge     Arborophila campbelli
split from: Arborophila orientalis

Siamese Partridge     Arborophila diversa
split from: Arborophila cambodiana

Hainan Peacock-Pheasant     Polyplectron katsumatae
split from: Polyplectron bicalcaratum

Malaysian Argus     Rheinardia nigrescens
split from: Rheinardia ocellata

Tundra Bean Goose     Anser serrirostris
split from: Anser fabalis

Tundra ' Lesser Canada Goose     Branta hutchinsii
split from: Branta canadensis

Crozet Pintail     Anas drygalskii
split from: Anas eatoni

Bar-breasted Piculet     Picumnus borbae
split from: Picumnus aurifrons

Pará Piculet     Picumnus pallidus
split from: Picumnus spilogaster

Arizona Woodpecker     Picoides arizonae
split from: Picoides stricklandi

Bronze-winged Woodpecker     Piculus aeruginosus
split from: Piculus rubiginosus

Crimson-fronted Barbet     Megalaima malabarica
split from: Megalaima rubricapilla

Woodward's Barbet     Stactolaema woodwardi
split from: Stactolaema olivacea

Gilded Barbet     Capito auratus
split from: Capito niger

Buff-bellied Puffbird     Notharchus swainsoni
split from: Notharchus macrorhynchos

Central African Hoopoe     Upupa senegalensis
split from: Upupa africana

Madagascar Hoopoe     Upupa marginata
split from: Upupa africana

Comoro Cuckoo-Roller     Leptosomus gracilis
split from: Leptosomus discolor

Highland Motmot     Momotus aequatorialis
split from: Momotus momota

Horsfield's Cuckoo     Cuculus horsfieldi
split from: Cuculus saturatus

Green-capped Coua     Coua olivaceiceps
split from: Coua ruficeps

Seychelles Black-Parrot     Coracopsis barklyi
split from: Coracopsis nigra

Aztec Parakeet     Aratinga astec
split from: Aratinga nana

Grey-rumped Swiftlet     Collocalia marginata
split from: Collocalia esculenta

"fumosa" Band-rumped Swift     Chaetura fumosa
split from: Chaetura spinicauda

Chillagoe Swiftlet     Aerodramus chillagoensis
split from: Aerodramus spodiopygius

Fernando Po Swift     Apus sladeniae
split from: Apus barbatus

Boucard's Hermit     Phaethornis saturatus=adolphi
split from: Phaethornis longuemareus/striigularis

Salvin's Emerald     Chlorostilbon salvini
split from: Chlorostilbon canivetii

??? Emerald@     Chlorostilbon elegans
split from: Chlorostilbon ricordii??

West Andean Emerald     Chlorostilbon melanorhynchus
split from: Chlorostilbon gibsoni

Doubleday's Hummingbird     Cynanthus doubledayi
split from: Cynanthus latirostris

Emerald-bellied Woodnymph     Thalurania hypochlora
split from: Thalurania fannyi

Humboldt's Sapphire     Hylocharis humboldtii
split from: Hylocharis grayi

Cinnamon-sided Hummingbird     Amazilia wagneri
split from: Amazilia viridifrons

Purple-throated Mountain-gem     Lampornis calolaema
split from: Lampornis castaneoventris

Grey-tailed Mountain-gem     Lampornis cinereicauda
split from: Lampornis castaneoventris

Roti Island Hawk-Owl     Ninox rotiensis
split from: Ninox novaeseelandiae

Guatemalan Pygmy-Owl     Glaucidium cobanense
split from: Glaucidium gnoma

Mexican Whip-poor-will     Caprimulgus arizonae
split from: Caprimulgus vociferus

Ringed Turtle-Dove     Streptopelia risoria
split from: Streptopelia roseogrisea

Comoro Green-Pigeon     Treron griveaudi
split from: Treron australis

Barrow's Bustard     Eupodotis barrowii
split from: Eupodotis senegalensis

Aldabra Rail     Dryolimnas aldabranus
split from: Dryolimnas cuvieri

Wilson's Snipe     Gallinago delicata
split from: Gallinago gallinago

Chatham Islands Oystercatcher     Haematopus chathamensis
split from: Haematopus unicolor

Thayer's Gull     Larus thayeri
split from: Larus glaucoides

Cuban Kite     Chondrohierax wilsonii
split from: Chondrohierax uncinatus

Yellow-billed Kite     Milvus parasitus/aegyptius
split from: Milvus migrans

Ryukyu Serpent-Eagle     Spilornis perplexus
split from: Spilornis cheela

Mentawai Serpent-Eagle     Spilornis sipora
split from: Spilornis cheela

Natuna Serpent-Eagle     Spilornis natunensis
split from: Spilornis cheela

Bawean Serpent-Eagle     Spilornis baweanus
split from: Spilornis cheela

Nias Serpent-Eagle     Spilornis asturinus
split from: Spilornis cheela

Simeulue Serpent-Eagle     Spilornis abbotti
split from: Spilornis cheela

Madagascar Marsh-Harrier     Circus macrosceles
split from: Circus maillardi

American Harrier     Circus hudsonius
split from: Circus cyaneus

Variable Goshawk     Accipiter hiogaster
split from: Accipiter novaehollandiae

Forest Buzzard     Buteo trizonatus
split from: Buteo oreophilus

Indian Spotted Eagle     Aquila hastata
split from: Aquila pomarina

Eurasian Tawny Eagle     Aquila vindhiana
split from: Aquila rapax

Northern Crested Caracara     Caracara cheriway
split from: Caracara plancus

Grebe     Podiceps navasi
split from: Podiceps major

Crozet Shag     Phalacrocorax melanogenis
split from: Phalacrocorax atriceps

Greater Flamingo     Phoenicopterus roseus
split from: Phoenicopterus ruber (American Flamingo)

Dwarf Olive Ibis     Bostrychia bocagei
split from: Bostrychia olivacea

Greater Snow Petrel     Pagodroma confusa
split from: Pagodroma nivea

Herald Petrel     Pterodroma heraldica
split from: Pterodroma arminjoniana

Jamaican Petrel     Pterodroma caribbaea
split from: Pterodroma hasitata

Newell's Shearwater     Puffinus newelli
split from: Puffinus auricularis

Loja Tyrannulet     Zimmerius flavidifrons
split from: Zosterops chrysops

"Dull" Yellow-breasted Flycatcher     Tolmomyias viridiceps
split from: Tolmomyias flaviventris

Atlantic Royal-Flycatcher     Onychorhynchus swainsoni
split from: Onychorhynchus coronatus

Pacific Royal-Flycatcher     Onychorhynchus occidentalis
split from: Onychorhynchus coronatus

Caatinga Black-Tyrant     Knipolegus franciscanus
split from: Knipolegus atterimus

Yellow-cheeked Becard     Pachyramphus xanthogenys
split from: Pachyramphus viridis

Lined Antshrike     Thamnophilus tenuepunctatus
split from: Thamnophilus palliatus (Chestnut-backed Antshrike)

"fuscicauda" Blackish Antbird     Cercomacra fuscicauda
split from: Cercomacra nigrescens

Royal Cinclodes     Cinclodes aricomae
split from: Cinclodes excelsior

Chinchipe Spinetail     Synallaxis chinchipensis
split from: Synallaxis stictothorax

Marañón Crescent-chest     Melanopareia maranonica
split from: Melanopareia elegans

Ashy Myzomela     Myzomela cineracea
split from: Myzomela eques

Large Vireo     Vireo gravis
split from: Vireo solitarius

Sympatric Warbling-Vireo     Vireo sympatrica
split from: Vireo swainsonii

Victoria Mountains Warbling-Vireo     Vireo victoriae
split from: Vireo gilvus

Northern Lemon-chested Greenlet     Hylophilus griseiventris
split from: Hylophilus thoracicus

"Himalayan" Jungle-Crow     Corvus japonensis
split from: Corvus macrorhynchos??

Green Jay     Cyanocorax luxuosus
split from: Cyanocorax yncas

Bornean Treepie     Dendrocitta cinerascens
split from: Dendrocitta occipitalis

Black-billed Magpie     Pica hudsonia
split from: Pica pica

Comoro Cuckooshrike     Coracina cucullata
split from: Coracina cinerea

Spot-breasted Fantail     Rhipidura albogularis
split from: Rhipidura albicollis

Solomon Islands Drongo     Dicrurus solomonensis
split from: Dicrurus bracteatus

Annobon Paradise-Flycatcher     Terpsiphone smithii
split from: Terpsiphone rufiventer

Kauai Elepaio     Chasiempis sclateri
split from: Chasiempis sandwichensis

Oahu Elepaio     Chasiempis ibidis
split from: Chasiempis sandwichensis

Comoro Blue Vanga     Cyanolanius comorensis
split from: Cyanolanius madagascarinus

Amber Mountain Rock-Thrush     Pseudocossyphus erythronotus
split from: Pseudocossyphus sharpei

Taita Thrush     Turdus helleri
split from: Turdus olivaceus

Somali Thrush     Turdus ludoviciae
split from: Turdus olivaceus

Brown-streaked Flycatcher     Muscicapa williamsoni
split from: Muscicapa dauurica

Red-throated Flycatcher     Ficedula albicilla
split from: Ficedula parva

Chinese Flycatcher     Ficedula elisae
split from: Ficedula narcissina

Furtive Flycatcher     Ficedula disposita
split from: Ficedula crypta

Black Bushchat     Saxicola aethiops
split from: Saxicola caprata

Red-tailed Wheatear     Oenanthe chrysopygia
split from: Oenanthe xanthoprymna

White-browed Wren     Thryothorus albinucha
split from: Thryothorus ludovicianus

Southern House-Wren     Troglodytes musculus
split from: Troglodytes aedon

Antillean Wren     Troglodytes martinicensis
split from: Troglodytes aedon

White-browed Gnatcatcher     Polioptila bilineata
split from: Polioptila plumbea

Cape Titmouse     Baeolophus cineraceus
split from: Baeolophus inornatus

Black-browed Tit     Aegithalos bonvaloti
split from: Aegithalos iouschistos

Pale Martin     Riparia diluta
split from: Riparia riparia

Uluguru Mountain Greenbul     Andropadus neumanni
split from:

Pale-crowned Cisticola     Cisticola cinnamomeus
split from: Cisticola brunnescens

Swamp Prinia     Prinia cinerascens
split from: Prinia burnesii

Saffron-breasted / Drakensberg Prinia     Prinia hypoxantha
split from: Prinia maculosa

Taita Apalis     Apalis fuscigularis
split from: Apalis thoracica

Namuli Apalis     Apalis lynesi
split from: Apalis thoracica

Miombo Wren-Warbler     Calamonastes undosus
split from: Calamonastes simplex

Kirk's White-eye     Zosterops kirki
split from: Zosterops senegalensis

Kulal White-eye     Zosterops kulalensis
split from: Zosterops poliogaster

Taita White-eye     Zosterops silvanus
split from: Zosterops poliogaster

South Pare White-eye     Zosterops winifredae
split from: Zosterops poliogaster

Cape White-eye     Zosterops capensis
split from: Zosterops pallidus

Green White-eye     Zosterops virens
split from: Zosterops pallidus

Mauritius Grey White-eye     Zosterops mauritianus
split from: Zosterops borbonicus

Benguet Bush-Warbler     Bradypterus seebohmi
split from: Bradypterus mandelli

Javan Bush-Warbler     Bradypterus montis
split from: Bradypterus mandelli

Timor Bush-Warbler     Bradypterus timoriensis
split from: Bradypterus mandelli

Subdesert Brush-Warbler     Nesillas lantzii
split from: Nesillas typica

Moheli Brush-Warbler     Nesillas moheliensis
split from: Nesillas typica

Oriental Reed-Warbler     Acrocephalus orientalis
split from: Acrocephalus arundinaceus

?? Warbler     Seicercus distinctus
split from: Seicercus tephrocephalus

Black-headed Sibia     Heterophasia desgodinsi
split from: Heterophasia melanoleuca

Damara Clapper Lark     Mirafra damarensis
split from: Mirafra apiata

Visayan Flowerpecker     Dicaeum haematostictum
split from: Dicaeum australe

Abbott's Sunbird     Nectarinia abbotti
split from: Nectarinia sovimanga?

Violet-breasted Sunbird     Nectarinia chalcomelas
split from: Nectarinia pembae

Comoro Green Sunbird     Nectarinia moebii
split from: Nectarinia notata?

Temminck's Sunbird     Aethopyga temminckii
split from: Aethopyga mystacalis

Pacific Water Pipit     Anthus japonicus
split from:

Asian Desert Sparrow     Passer zarudnyi
split from: Passer simplex

Menzbier's Pipit     Anthus menzbieri
split from: Anthus gustavi

Aldabra Fody     Foudia aldabrana
split from: Foudia eminentissima

Chestnut-eared Finch     Taeniopygia castanotis
split from: Taeniopygia guttata

Thick-billed Fox Sparrow     Passerella megarhyncha
split from: Passerella iliaca

Sooty Fox Sparrow     Passerella unalaschensis
split from: Passerella iliaca

Slate-coloured Fox Sparrow     Passerella schistacea
split from: Passerella iliaca

Baird's Junco     Junco bairdi
split from: Junco phaeonotus

Ipswich Sparrow     Passerculus princeps
split from: Passerculus sandwichensis

Belding's Sparrow     Passerculus beldingi
split from: Passerculus sandwichensis

Sage Sparrow     Amphispiza nevadensis
split from: Amphispiza belli

Audubon's Warbler     Dendroica auduboni
split from: Dendroica coronata

Barbuda Warbler     Dendroica subita
split from: Dendroica adelaidae

St. Lucia Warbler     Dendroica ???
split from: Dendroica adelaidae

Choco Warbler     Basileuterus chlorophrys
split from: Basileuterus chrysogaster

Chestnut-capped Warbler     Basileuterus delattrii
split from: Basileuterus rufifrons

Western Hemispingus     Hemispingus ochraceus
split from: Hemispingus melanotis

Piura Hemispingus     Hemispingus piurae
split from: Hemispingus melanotis

Olive Tanager     Chlorothraupis frenata
split from: Chlorothraupis carmioli

White-bellied Tanager     Tangara brasiliensis
split from: Tangara mexicana

Silver-breasted Tanager     Tangara cyanomelaena
split from: Tangara velia

Yellow-tufted Dacnis     Dacnis egregia
split from: Dacnis lineata

Black Seedeater     Sporophila corvina
split from: Sporophila americana

Caquetá Seedeater     Sporophila murallae
split from: Sporophila americana

Slate-blue Seedeater     Amaurospiza relicta
split from: Amaurospiza concolor

Black-cowled Oriole     Icterus prosthemelas
split from: Icterus dominicensis

Pale Cowbird     Molothrus fringillarius
split from: Molothrus badius

Bronze-brown Cowbird     Molothrus armenti
split from: Molothrus aeneus