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.
