List of data deficient birds

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

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

Gruiformes

Owls

Passerines

Caprimulgiformes

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