As of June 2026, the International Union for Conservation of Nature (IUCN) listed 668 vulnerable avian species. Of all evaluated avian species, 6.0% are listed as vulnerable. No subpopulations of birds have been evaluated by the IUCN.
For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of extinction in the wild". Endangered and critically endangered species also meet the quantitative criteria of vulnerable species, and are listed separately. See: List of endangered birds, List of critically endangered birds. Vulnerable, endangered and critically endangered species are collectively referred to as threatened species by the IUCN.
Additionally, 36 avian species (0.3% of those evaluated) are listed as data deficient, meaning there is insufficient information for a full assessment of conservation status. As these species typically have small distributions and/or populations, they are intrinsically likely to be threatened, according to the IUCN. While the category of data deficient indicates that no assessment of extinction risk has been made for the taxa, the IUCN notes that it may be appropriate to give them "the same degree of attention as threatened taxa, at least until their status can be assessed".
This is a complete list of vulnerable avian species evaluated by the IUCN. Where possible common names for taxa are given while links point to the scientific name used by the IUCN.
Struthioniformes
Somali ostrich
Apterygiformes
Southern brown kiwi Great spotted kiwi North Island brown kiwi Okarito kiwi
Tinamiformes
Anseriformes
Galliformes
Megapodiidae
Cracidae
Numididae
White-breasted guineafowl
Odontophoridae
Phasianidae
Caprimulgiformes
Podargiformes
Large frogmouth
Apodiformes
Otidiformes
Cuculiformes
Mesitornithiformes
Columbiformes
Gruiformes
Rallidae
Psophiidae
Dark-winged trumpeter
Gruidae
Podicipediformes
Horned grebe
Phoenicopteriformes
Andean flamingo
Charadriiformes
Sphenisciformes
Procellariiformes
Diomedeidae
Hydrobatidae
Matsudaira's storm petrel Monteiro's storm petrel
Procellariidae
Suliformes
Pelecaniformes
Accipitriformes
Strigiformes
Tytonidae
Strigidae
Trogoniformes
Javan trogon Cinnamon-rumped trogon
Bucerotiformes
Coraciiformes
Piciformes
Falconiformes
Psittaciformes
Strigopidae
New Zealand kaka
Cacatuidae
Blue-eyed cockatoo
Psittacidae
Psittaculidae
Passeriformes
Petroicidae
Black robin
Philepittidae
Yellow-bellied sunbird-asity Schlegel's asity
Eurylaimidae
Grauer's broadbill Visayan broadbill Wattled broadbill
Pittidae
Blue-headed pitta Fairy pitta Azure-breasted pitta
Furnariidae
Thamnophilidae
Grallariidae
Rhinocryptidae
Marsh tapaculo
Tyrannidae
Cotingidae
Pipridae
Tityridae
Slaty becard
Onychorhynchidae
Atlantic royal flycatcher
Maluridae
Meliphagidae
Dasyornithidae
Eastern bristlebird
Notiomystidae
Stitchbird
Platysteiridae
Banded wattle-eye
Malaconotidae
Green-breasted bushshrike
Vangidae
Pityriasidae
Bornean bristlehead
Campephagidae
Pachycephalidae
Bower's shrikethrush Red-lored whistler
Vireonidae
San Andres vireo
Oriolidae
São Tomé oriole
Dicruridae
Mayotte drongo
Rhipiduridae
Natewa silktail Malaita fantail Manus fantail
Monarchidae
Corvidae
Paradisaeidae
Goldie's bird-of-paradise Blue bird-of-paradise
Picathartidae
Alaudidae
Pycnonotidae
Hirundinidae
Phylloscopidae
Acrocephalidae
Locustellidae
Bernieridae
Appert's tetraka
Cisticolidae
Sylviidae
Paradoxornithidae
Jerdon's babbler Black-breasted parrotbill Przevalski's parrotbill Grey-hooded parrotbill Black-headed parrotbill
Zosteropidae
Timaliidae
Pellorneidae
Leiothrichidae
Troglodytidae
Sittidae
Mimidae
Sturnidae
Turdidae
Muscicapidae
Cinclidae
Rufous-throated dipper
Chloropseidae
Philippine leafbird
Dicaeidae
Black-belted flowerpecker Scarlet-collared flowerpecker
Nectariniidae
Passeridae
Abd al-Kuri sparrow
Ploceidae
Estrildidae
Motacillidae
Fringillidae
Passerellidae
Calyptophilidae
Western chat-tanager
Phaenicophilidae
White-winged warbler
Nesospingidae
Puerto Rican tanager
Icteridae
Parulidae
Thraupidae
See also Lists of IUCN Red List vulnerable species List of least concern birds List of near threatened birds List of endangered birds List of critically endangered birds List of extinct bird species since 1500 List of data deficient birds
References