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 January 2026, the International Union for Conservation of Nature (IUCN) lists 37 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.
Includes petrels and albatrosses
("Crane-like")
- Black-headed rufous warbler
- Sillem's mountain finch
- Black-tailed cisticola
- Tana River cisticola
- Dusky tetraka
- Spectacled flowerpecker
- Rossel cicadabird
- Duida grass-finch
- Louisiade pitta
- Black-lored waxbill
- Eastern wattled cuckooshrike
- Black-browed babbler
- Tessmann's flycatcher
- White-chinned myzomela
- Sombre rock chat
- Javan oriole
- Red Sea cliff swallow
- Snow Mountains robin
- Upemba masked weaver
- African river martin
- Blue-wattled bulbul
- Obbia lark
- Philippa's crombec
- White-tailed tityra
Other bird species
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 8 January 2026.