List of data deficient birds
- Extinct in the wild (EW): 5 species
- Critically endangered (CR): 223 species
- Endangered (EN): 460 species
- Vulnerable (VU): 798 species
- Near threatened (NT): 1,001 species
- Least concern (LC): 8,460 species
- Data deficient (DD): 46 species
Avian species (IUCN, 2020-3)
- 10,999 extant species have been evaluated
- 10,947 of those are fully assessed
- 9,461 are not threatened at present
- 1,481 to 1,533 are threatened
- 164 to 183 are extinct or extinct in the wild:
- 159 extinct (EX) species
- 5 extinct in the wild (EW)
- 19 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 December 2020, the International Union for Conservation of Nature (IUCN) lists 46 data deficient avian species. 0.47% of all evaluated avian species are listed as data deficient. No subpopulations of birds have been evaluated by the IUCN.
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.