•   Extinct in the wild (EW): 5 species
•   Critically endangered (CR): 223 species
•   Endangered (EN): 460 species
•   Vulnerable (VU): 798 species
•   Near threatened (NT): 1,001 species
•   Least concern (LC): 8,460 species
•   Data deficient (DD): 46 species

Avian species (IUCN, 2020-3)

• 10,999 extant species have been evaluated
• 10,947 of those are fully assessed^{[lower-alpha 1]}
• 9,461 are not threatened at present^{[lower-alpha 2]}
• 1,481 to 1,533 are threatened^{[lower-alpha 3]}
• 164 to 183 are extinct or extinct in the wild:
  • 159 extinct (EX) species^{[lower-alpha 4]}
  • 5 extinct in the wild (EW)
  • 19 possibly extinct [CR(PE)]

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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

In December 2019, the International Union for Conservation of Nature (IUCN) listed 8460 least concern avian species.^[1] Of all evaluated avian species, 76.9% are listed as least concern. No subpopulations of birds have been evaluated by the IUCN.

This is a complete list of least concern 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.

Penguins

Procellariiformes

Procellariiformes includes petrels and albatrosses. There are 54 species in the order Procellariiformes assessed as least concern.

Gruiformes

There are 98 species in the order Gruiformes assessed as least concern.

Grebes

Bustards

Parrots

There are 226 parrot species assessed as least concern.

Ciconiiformes

Suliformes

There are 34 species in the order Suliformes assessed as least concern.

Pigeons and doves

Pelecaniformes

There are 82 species in the order Pelecaniformes assessed as least concern.

Galliformes

There are 186 species in the order Galliformes assessed as least concern.

Struthioniformes

There are 38 species in the order Struthioniformes assessed as least concern.

Bucerotiformes

Bucerotiformes includes hornbills, hoopoe and wood hoopoes. There are 46 species in the order Bucerotiformes assessed as least concern.

Accipitriformes

Accipitriformes includes most of the diurnal birds of prey. There are 163 species in the order Accipitriformes assessed as least concern.

Anseriformes

There are 126 species in the order Anseriformes assessed as least concern.

New World vultures

Owls

There are 160 owl species assessed as least concern.

Charadriiformes

There are 276 species in the order Charadriiformes assessed as least concern.

Falconiformes

Coraciiformes

Coraciiformes includes kingfishers and bee-eaters. There are 137 species in the order Coraciiformes assessed as least concern.

Passerines

There are 4808 passerine species assessed as least concern.