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 Landfowl
Dulit partridge
Caprimulgiformes Nightjars
Apodiformes Hummingbirds and swifts
Gruiformes Cranes, rails, finfoots, and trumpeters
Charadriiformes Shorebirds and gulls
Luzon buttonquail
Procellariiformes Petrels, albatrosses, and shearwaters
Strigiformes Owls
Coraciiformes Kingfishers and allies
Little paradise kingfisher
Psittaciformes Parrots
Blue-fronted lorikeet
Passeriformes Passerines
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
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