List of data deficient birds
- Extinct in the wild (EW): 5 species
- Critically endangered (CR): 216 species
- Endangered (EN): 372 species
- Vulnerable (VU): 670 species
- Near threatened (NT): 967 species
- Least concern (LC): 8,767 species
- Data deficient (DD): 37 species
Avian species (IUCN, 2025-2)
- 11,198 extant species have been evaluated
- 11,161 of those are fully assessed[a]
- 9,734 are not threatened at present[b]
- 1,427 to 1,464 are threatened[c]
- 169 to 187 are extinct or extinct in the wild:
- 164 extinct (EX) species[d]
- 5 extinct in the wild (EW)
- 18 possibly extinct [CR(PE)]
- ^ excludes data deficient evaluations.
- ^ NT and LC.
- ^ Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
- ^ Chart omits extinct (EX) species
As of June 2026, the International Union for Conservation of Nature (IUCN) lists 36 data deficient avian species.[1]
This is a complete list of data deficient 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.
Landfowl
Nightjars
Hummingbirds and swifts
Cranes, rails, finfoots, and trumpeters
Shorebirds and gulls
Petrels, albatrosses, and shearwaters
Owls
Kingfishers and allies
Parrots
Passerines
- Black-headed rufous warbler
- Sillem's mountain finch
- Prigogine's greenbul
- Tana River cisticola
- Dusky tetraka
- Spectacled flowerpecker
- Duida grass-finch
- Louisiade pitta
- Black-lored waxbill
- Eastern wattled cuckooshrike
- Friedmann's lark
- White-chinned myzomela
- Sombre rock chat
- Javan oriole
- Red Sea cliff swallow
- Blue-wattled bulbul
- Philippa's crombec
- White-tailed tityra
See also
- Lists of IUCN Red List data deficient species
- List of least concern birds
- List of near threatened birds
- List of vulnerable birds
- List of endangered birds
- List of critically endangered birds
- List of recently extinct birds
References
- ^ "IUCN Red List version 2025-2". The IUCN Red List of Threatened Species. International Union for Conservation of Nature and Natural Resources (IUCN). Retrieved 10 June 2026.