List of data deficient birds

Last updated

Circle frame.svg5 extinct in the wild avian species (0.04%)216 critically endangered avian species (1.9%)372 endangered avian species (3.3%)670 vulnerable avian species (6.0%)967 near threatened avian species (8.6%)8,767 least concern avian species (78.3%)37 data deficient avian species (0.3%)
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)]
  1. ↑ excludes data deficient evaluations.
  2. ↑ NT and LC.
  3. ↑ Threatened comprises CR, EN and VU. Upper estimate additionally includes DD.
  4. ↑ Chart omits extinct (EX) species

As of January 2026, the International Union for Conservation of Nature (IUCN) lists 37 data deficient avian species. [1]

Contents

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.

Procellariiformes

Includes petrels and albatrosses

Gruiformes

("Crane-like")

Owls

Passerines

Caprimulgiformes

Other bird species

See also

References

  1. ↑ "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.
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