List of data deficient birds

As of December 2020, the International Union for Conservation of Nature (IUCN) lists 46 data deficient avian species.

[1] 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.

Includes petrels and albatrosses ("Crane-like")

5 extinct in the wild avian species (0.05%) 223 critically endangered avian species (2%) 460 endangered avian species (4.2%) 798 vulnerable avian species (7.2%) 1,001 near threatened avian species (9.1%) 8,460 least concern avian species (76.9%) 52 data deficient avian species (0.4%)