As of June 2026, the International Union for Conservation of Nature (IUCN) lists 36 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.
Galliformes
Dulit partridge
Caprimulgiformes
Apodiformes
Gruiformes
Charadriiformes
Luzon buttonquail
Procellariiformes
Strigiformes
Coraciiformes
Little paradise kingfisher
Psittaciformes
Blue-fronted lorikeet
Passeriformes
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