List of Otidiformes by population

This is a list of Otidiformes species by global population. While numbers are estimates, they have been made by the experts in their fields. For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology.

The IOC World Bird List (version 15.1) recognizes 26 species of Otidiformes.[1] IUCN/BirdLife International have assessed all members of this order, with population estimates provided for 11 (42%) species.

This list follows IUCN classifications for species names. Where IUCN classifications differ from other ornithological authorities, alternative names are noted. While not all of these species have had their populations quantified, species without estimates are also listed below in a separate table.

Species by global population

Common name Binomial name Population Status Trend Notes Image
Great Indian bustard Ardeotis nigriceps 50-249[2] CR[2] [2] Total population is estimated to be less than 300 individuals.[2]
Bengal florican Houbaropsis bengalensis 250-999[3] CR[3] [3] Total population is estimated to be 375-1,499 individuals.[3]
Lesser florican Sypheotides indicus 356-1,228[4] CR[4] [4] Best estimate for breeding population is 730 mature individuals.[4]
Australian bustard Ardeotis australis 6,700-67,000[5] LC[5] [5] Total population is estimated to be less than 100,000 individuals.[5]
Blue bustard

(Blue korhaan)

Eupodotis caerulescens 8,000-10,000[6] NT[6] [6] Total population is estimated to be 12,000-15,000 individuals.[6]
African houbara Chlamydotis undulata 11,000-30,000[7] VU[7] [7] Value provided is a rough estimate for total population.[7]
Kori bustard Ardeotis kori 20,000-50,000[8] NT[8] [8] Values provided are a tentative estimate of total population.[8]
Great bustard Otis tarda 29,600-33,000[9] EN[9] [9]
Asian houbara Chlamydotis macqueenii 33,000-67,000[10] VU[10] [10] Total population is estimated to be 50,000-99,999 individuals.[10]
Ludwig's bustard Neotis ludwigii 70,000-335,000[11] EN[11] [11] Total population is estimated to be 100,000-499,999 individuals.[11]
Little bustard Tetrax tetrax 100,000-499,999[12] NT[12] [12] European subpopulation estimated at 122,000-240,000 mature individuals.[12]

Species without population estimates

Common name Binomial name Population Status Trend Notes Image
Southern black bustard

(Southern black korhaan)

Afrotis afra unknown[13] VU[13] [13]
Nubian bustard Neotis nubia unknown[14] VU[14] [14]
Arabian bustard Ardeotis arabs unknown[15] NT[15] [15]
Little brown bustard Heterotetrax humilis unknown[16] NT[16] [16]
Denham's bustard Neotis denhami unknown[17] NT[17] [17] Southern African population is estimated to be between 2,500-10,000 mature individuals; populations across the rest of range have not been estimated well enough to provide a global estimate.[17]
Northern black bustard

(Northern black korhaan)

Afrotis afraoides unknown[18] LC[18] [18]
White-bellied bustard Eupodotis senegalensis unknown[19] LC[19] [19]
Rüppell's bustard

(Rüppell's korhaan)

Heterotetrax rueppelii unknown[20] LC[20] [20]
Karoo bustard

(Karoo korhaan)

Heterotetrax vigorsii unknown[21] LC[21] [21]
Hartlaub's bustard Lissotis hartlaubii unknown[22] LC[22] [22]
Black-bellied bustard Lissotis melanogaster unknown[23] LC[23] [23]
Buff-crested bustard Lophotis gindiana unknown[24] LC[24] [24]
Red-crested bustard

(Red-crested korhaan)

Lophotis ruficrista unknown[25] LC[25] [25]
Savile's bustard Lophotis savilei unknown[26] LC[26] [26]
Heuglin's bustard Neotis heuglinii unknown[27] LC[27] [27]


See also

References

  1. ^ "Turacos, bustards, cuckoos, mesites, sandgrouse – IOC World Bird List". www.worldbirdnames.org. Retrieved 2025-12-22.
  2. ^ a b c d BirdLife International (2018). "Ardeotis nigriceps". The IUCN Red List of Threatened Species. 2018 e.T22691932A134188105. doi:10.2305/iucn.uk.2018-2.rlts.t22691932a134188105.en.
  3. ^ a b c d BirdLife International (2018). "Houbaropsis bengalensis". IUCN Red List of Threatened Species. 2018 e.T22692015A130184896. doi:10.2305/iucn.uk.2018-2.rlts.t22692015a130184896.en.
  4. ^ a b c d BirdLife International (2021). "Sypheotides indicus". IUCN Red List of Threatened Species. 2021 e.T22692024A199959007. doi:10.2305/iucn.uk.2021-3.rlts.t22692024a199959007.en.
  5. ^ a b c d BirdLife International (2024). "Ardeotis australis". IUCN Red List of Threatened Species. 2024 e.T22691940A263666217. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691940A263666217.en. Retrieved 2025-12-22.
  6. ^ a b c d "Eupodotis caerulescens: BirdLife International". IUCN Red List of Threatened Species. 2017. Retrieved 2023-03-17.
  7. ^ a b c d BirdLife International (2023). "Chlamydotis undulata". IUCN Red List of Threatened Species. 2023 e.T22728245A208501099. doi:10.2305/IUCN.UK.2023-1.RLTS.T22728245A208501099.en. Retrieved 2025-12-22.
  8. ^ a b c d BirdLife International (2025). "Ardeotis kori". IUCN Red List of Threatened Species. 2025 e.T22691928A246077557. doi:10.2305/IUCN.UK.2025-2.RLTS.T22691928A246077557.en. Retrieved 2025-12-22.
  9. ^ a b c BirdLife International (2023). "Otis tarda". IUCN Red List of Threatened Species. 2023 e.T22691900A226280431. doi:10.2305/IUCN.UK.2023-1.RLTS.T22691900A226280431.en. Retrieved 2025-12-22.
  10. ^ a b c d BirdLife International (2021). "Chlamydotis macqueenii". IUCN Red List of Threatened Species. 2021 e.T22733562A205364424. doi:10.2305/iucn.uk.2021-3.rlts.t22733562a205364424.en.
  11. ^ a b c d BirdLife International (2025). "Neotis ludwigii". IUCN Red List of Threatened Species. 2025 e.T22691910A265043015. doi:10.2305/IUCN.UK.2025-2.RLTS.T22691910A265043015.en. Retrieved 2025-12-22.
  12. ^ a b c d BirdLife International (2018). "Tetrax tetrax". IUCN Red List of Threatened Species. 2018 e.T22691896A129913710. doi:10.2305/iucn.uk.2018-2.rlts.t22691896a129913710.en.
  13. ^ a b c BirdLife International (2025). "Afrotis afra". IUCN Red List of Threatened Species. 2025 e.T22691975A231842203. doi:10.2305/IUCN.UK.2025-2.RLTS.T22691975A231842203.en. Retrieved 2025-12-22.
  14. ^ a b c BirdLife International (2025). "Neotis nubia". IUCN Red List of Threatened Species. 2025 e.T22691914A265041978. doi:10.2305/IUCN.UK.2025-2.RLTS.T22691914A265041978.en. Retrieved 2025-12-22.
  15. ^ a b c BirdLife International (2018). "Ardeotis arabs". IUCN Red List of Threatened Species. 2018 e.T22691924A129917069. doi:10.2305/IUCN.UK.2018-2.RLTS.T22691924A129917069.en. Retrieved 2025-12-22.
  16. ^ a b c BirdLife International (2025). "Heterotetrax humilis". IUCN Red List of Threatened Species. 2025 e.T22691991A265043348. doi:10.2305/IUCN.UK.2025-2.RLTS.T22691991A265043348.en. Retrieved 2025-12-22.
  17. ^ a b c d BirdLife International (2025). "Neotis denhami". IUCN Red List of Threatened Species. 2025 e.T22691905A265042404. doi:10.2305/IUCN.UK.2025-2.RLTS.T22691905A265042404.en. Retrieved 2025-12-22.
  18. ^ a b c BirdLife International (2024). "Afrotis afraoides". IUCN Red List of Threatened Species. 2024 e.T22691970A263673251. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691970A263673251.en. Retrieved 2025-12-22.
  19. ^ a b c BirdLife International (2024). "Eupodotis senegalensis". IUCN Red List of Threatened Species. 2024 e.T22691996A263667271. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691996A263667271.en. Retrieved 2025-12-22.
  20. ^ a b c BirdLife International (2024). "Heterotetrax rueppelii". IUCN Red List of Threatened Species. 2024 e.T22691980A263670744. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691980A263670744.en. Retrieved 2025-12-22.
  21. ^ a b c BirdLife International (2024). "Heterotetrax vigorsii". IUCN Red List of Threatened Species. 2024 e.T22691986A263669161. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691986A263669161.en. Retrieved 2025-12-22.
  22. ^ a b c BirdLife International (2024). "Lissotis hartlaubii". IUCN Red List of Threatened Species. 2024 e.T22692011A263650083. doi:10.2305/IUCN.UK.2024-2.RLTS.T22692011A263650083.en. Retrieved 2025-12-22.
  23. ^ a b c BirdLife International (2024). "Lissotis melanogaster". IUCN Red List of Threatened Species. 2024 e.T22692007A263652363. doi:10.2305/IUCN.UK.2024-2.RLTS.T22692007A263652363.en. Retrieved 2025-12-22.
  24. ^ a b c BirdLife International (2024). "Lophotis gindiana". IUCN Red List of Threatened Species. 2024 e.T22691960A263663322. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691960A263663322.en. Retrieved 2025-12-22.
  25. ^ a b c BirdLife International (2024). "Lophotis ruficrista". IUCN Red List of Threatened Species. 2024 e.T22691965A263660641. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691965A263660641.en. Retrieved 2025-12-22.
  26. ^ a b c BirdLife International (2024). "Lophotis savilei". IUCN Red List of Threatened Species. 2024 e.T22691955A263661312. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691955A263661312.en. Retrieved 2025-12-22.
  27. ^ a b c BirdLife International (2024). "Neotis heuglinii". IUCN Red List of Threatened Species. 2024 e.T22691920A263641558. doi:10.2305/IUCN.UK.2024-2.RLTS.T22691920A263641558.en. Retrieved 2025-12-22.
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