List of Strigiformes by population

This list is not comprehensive, as not all Strigiformes have had their numbers quantified. For a simple list of all owl species, see the article "List of owl species".

The population of birds
Lists

Anseriformes (waterfowl)
Apodiformes (swifts and hummingbirds)
Caprimulgiformes (nightjars and relatives)
Charadriiformes (gulls and relatives)
Ciconiiformes (storks and relatives)
Columbiformes (doves and pigeons)
Coraciiformes (kingfishers and relatives)
Cuculiformes (cuckoos and relatives)
Falconiformes (falcons and relatives)
Galliformes (gamebirds)
Gaviiformes (loons or divers)
Gruiformes (cranes and relatives)
Passeriformes (perching birds)
Pelecaniformes (pelicans and relatives)
Phoenicopteriformes (flamingos)
Piciformes (woodpeckers and relatives)
Podicipediformes (grebes)
Procellariiformes (albatrosses and petrels)
Psittaciformes (parrots)
Sphenisciformes (penguins)
Strigiformes (owls)
Struthioniformes (ratites)
Tinamiformes (tinamous)
Trogoniformes (trogons and quetzals)
Key

Conservation status

  Extinct in the wild (EW)
  Critically endangered (CR)
  Endangered (EN)
  Vulnerable (VU)
  Near threatened (NT)
  Least concern (LC)
  Data deficient (DD)
Related
Lists of organisms by population
Lists of mammals by population
List of Late Quaternary prehistoric bird species
List of extinct birds
Lists of birds by region

Extinct Species:

Species by global population
Common name Binomial name Population Status Trend Notes Image
Pernambuco pygmy owlGlaucidium mooreorum0-49[6]CR[6]Decrease[6]Maximum estimate; possibly extinct.[6]
Siau scops owlOtus siaoensis1-49[7]CR[7]Steady[7]
Anjouan scops owlOtus capnodes2,300-3,600[8]EN[8]Decrease[8]
Forest owletHeteroglaux blewitti250-999[9]EN[9]Decrease[9]
Serendib scops owlOtus thilohoffmanni150-700[10]EN[10]Decrease[10]
Long-whiskered owletXenoglaux loweryi250-999[11]VU[11]Steady[11]
Manus masked owlTyto manusi?[12]LC[12]Steady[12]This subspecies is included under Tyto novaehollandiae. Population estimates are not given.[12]
São Tomé scops owlOtus hartlaubi250-999[13]VU[13]Decrease[13]
Taliabu masked owlTyto nigrobrunnea250-999[14]VU[14]?[14]
Moheli scops owlOtus moheliensis260[15]EN[15]Decrease[15]
Christmas boobookNinox natalis1000[16]VU[16]Steady[16]
Blakiston's fish owlKetupa blakistoni1,000-2,499[17]EN[17]Decrease[17]This subspecies is included under Bubo blakistoni.[17]
Karthala scops owlOtus pauliani2,300[18]EN[18]Decrease[18]
Cloud-forest pygmy owlGlaucidium nubicola1,500-7,000[19]VU[19]Decrease[19]
Javan scops owlOtus angelinae1,500-7,000[20]VU[20]Decrease[20]
Shelley's eagle-owlBubo shelleyi1,500-7,000[21]VU[21]Decrease[21]
Togian boobookNinox burhani1,500-7,000[22]NT[22]Decrease[22]
Usambara eagle-owlBubo vosseleri?[23]LC[23]Decrease[23]This subspecies is included under Bubo poensis.[23]
Powerful owlNinox strenua2,200-2,800[24]LC[24]Steady[24]
Albertine owletGlaucidium albertinum2,500-9,999[25]NT[25]Decrease[25]
Biak scops owlOtus beccarii2,500-9,999[26]VU[26]Decrease[26]
Cinnabar boobookNinox iosU[27]LC[27]Steady[27]
Congo bay owlPhodilus prigoginei2,500-9,999[28]EN[28]Decrease[28]
Enggano scops owlOtus enganensis2,500-9,999[29]NT[29]Steady[29]
Giant scops owlOtus gurneyi2,500-9,999[30]VU[30]Decrease[30]
Golden masked owlTyto aurantia2,500-9,999[31]VU[31]Decrease[31]
Minahasa masked owlTyto inexspectata2,500-9,999[32]VU[32]Decrease[32]
Philippine eagle-owlBubo philippensis2,500-9,999[33]VU[33]Decrease[33]
Red owlTyto soumagnei2,500-9,999[34]VU[34]Decrease[34]
Rufous fishing owlScotopelia ussheri2,500-9,999[35]VU[35]Decrease[35]
Sokoke scops owlOtus ireneae2,500-9,999[36]EN[36]Decrease[36]
White-fronted scops owlOtus sagittatus2,500-9,999[37]VU[37]Decrease[37]
Pemba scops owlOtus pembaensis3,000[38]VU[38]Decrease[38]
Fearful owlNesasio solomonensis2,500-9,999[39]VU[39]Decrease[39]
Colombian screech owlMegascops colombianus6,700[40]NT[40]Decrease[40]
Mantanani scops owlOtus mantananensis6,000-15,000[41]NT[41]Decrease[41]
Sumba boobookNinox rudolfi6,000-15,000[42]NT[42]Decrease[42]
Spotted owlStrix occidentalis15,000[43]NT[43]Decrease[43]
Chestnut-backed owletGlaucidium castanonotum10,000-19,999[44]NT[44]Decrease[44]
Least boobookNinox sumbaensis10,000-19,999[45]EN[45]Decrease[45]
Mentawai scops owlOtus mentawi10,000-19,999[46]NT[46]Decrease[46]
Mindoro scops owlOtus mindorensis10,000-19,999[47]NT[47]Decrease[47]
New Britain boobookNinox odiosa10,000-19,999[48]VU[48]Decrease[48]
Ochre-bellied boobookNinox ochracea10,000-19,999[49]NT[49]Decrease[49]
Palawan scops owlOtus fuliginosus10,000-19,999[50]NT[50]Decrease[50]
Balsas screech owlMegascops seductus20,000 – 49,999[51]LC[51]Decrease[51]
Bearded screech owlMegascops barbarus20,000 – 49,999[52]LC[52]Decrease[52]
Central American pygmy owlGlaucidium griseiceps?[53]LC[53]Steady[53]
Colima pygmy owlGlaucidium palmarum20,000 – 49,999[54]LC[54]Decrease[54]
Fulvous owlStrix fulvescens?[55]LC[55]Decrease[55]
Pacific screech owlMegascops cooperi50,000-499,999[56]LC[56]Decrease[56]
Tamaulipas pygmy owlGlaucidium sanchezi20,000 – 49,999[57]NT[57]Decrease[57]
Unspotted saw-whet owlAegolius ridgwayi?[58]LC[58]Steady[58]
Black-and-white owlStrix nigrolineata?[59]LC[59]Decrease[59]
Crested owlLophostrix cristata?[60]LC[60]Decrease[60]
Middle American screech owlMegascops guatemalae?[61]LC[61]Decrease[61]
Stygian owlAsio stygius?[62]LC[62]Decrease[62]
Great grey owlStrix nebulosa50,000-99,999[63]LC[63]Increase[63]
Long-eared owlAsio otus2,200,000-3,700,000[64]LC[64]Decrease[64]
Northern hawk-owlSurnia ulula100,000-499,999[65]LC[65]Steady[65]
Eurasian eagle-owlBubo bubo100,000-499,999[66]LC[66]Decrease[66]
Snowy owlBubo scandiaca14,000-28,000[67]VU[67]Decrease[67]
Eurasian pygmy owlGlaucidium passerinum500,000-1,199,999[68]LC[68]Steady[68]
Mottled owlStrix virgata?[69]LC[69]Decrease[69]
Spectacled owlPulsatrix perspicillata?[70]LC[70]Decrease[70]
Striped owlPseudoscops clamator500,000-4,999,999[71]LC[71]Decrease[71]
Eurasian scops owlOtus scops790,000-1,350,000[72]LC[72]Decrease[72]
Boreal owlAegolius funereus730,000-1,810,000[73]LC[73]Steady[73]
Short-eared owlAsio flammeus1,200,000-2,100,000[74]LC[74]Decrease[74]
Tawny owlStrix aluco1,000,000-2,999,999[75]LC[75]Steady[75]
Little owlAthene noctua5,000,000-9,999,999[76]LC[76]Steady[76]
Greater sooty owlTyto tenebricosa?[77]LC[77]Decrease[77]
Lesser sooty owlTyto multipunctata4,000[78]LC[78]Decrease[78]Estimated to be around 2,000 breeding pairs[79]
Abyssinian owlAsio abyssinicus?[80]LC[80]Steady[80]
African barred owletGlaucidium capense?[81]LC[81]Decrease[81]
African grass-owlTyto capensis?[82]LC[82]Decrease[82]
African scops owlOtus senegalensis?[83]LC[83]Steady[83]
African wood owl Strix woodfordii ?[84]LC[84]Steady[84]
Akun eagle-owl Ketupa leucosticta ?[85]LC[85]Decrease[85]
Amazonian Pygmy-owl Glaucidium hardyi ?[86]LC[86]Decrease[86]
Barn owl Tyto alba 4,000,000-9,999,999[87]LC[87]Steady[87] Includes all subspecies
Andaman boobook Ninox affinis 2,500-9,999[88]LC[88]Decrease[88]
Andaman scops owl Otus balli ?[89]LC[89]Steady[89]
Andean pygmy owl Glaucidium jardinii ?[90]LC[90]Steady[90]
Annobon scops owl Otus feae 50-249[91]CR[91]Decrease[91]
Arabian eagle-owl Bubo milesi 4,000-9,999[92]LC[92]Steady[92]
Arabian scops owl Otus pamelae 60,000[93]LC[93]Steady[93]
Ashy-faced owl Tyto glaucops ?[94]LC[94]Steady[94]
Asian barred owlet Glaucidium cucoloides ?[95]LC[95]Increase[95]
Austral pygmy owl Glaucidium nana ?[96]LC[96]Steady[96]
Australian boobook Ninox boobook ?[97]LC[97]Steady[97]
Australian masked owl Tyto novaehollandiae ?[98]LC[98]Steady[98]
Baja pygmy owl Glaucidium hoskinsii ?[99]LC[99]Steady[99]
Band-bellied owl Pulsatrix melanota ?[100]LC[100]Decrease[100]
Banggai scops owl Otus mendeni 2,500-9,999[101]VU[101]Decrease[101]
Bare-legged owl Margarobyas lawrencii ?[102]LC[102]Steady[102]
Bare-shanked screech owl Megascops clarkii 20,000-49,999[103]LC[103]Steady[103]
Barking owl Ninox connivens ?[104]LC[104]Decrease[104]
Barred eagle-owl Bubo sumatranus ?[105]NT[105]Decrease[105]
Barred owl Strix varia ?[106]LC[106]Increase[106]
Black-banded owl Ciccaba huhula ?[107]LC[107]Decrease[107]
Black-capped screech owl Megascops atricapilla ?[108]LC[108]Steady[108]
Brown boobook Ninox scutulata ?[109]LC[109]Decrease[109]
Brown fish owl Ketupa zeylonensis ?[110]LC[110]Decrease[110]
Brown wood owl Strix leptogrammica ?[111]LC[111]Decrease[111]
Buff-fronted owl Aegolius harrisii ?[112]LC[112]Steady[112]
Buffy fish owl Ketupa ketupu ?[113]LC[113]Steady[113]
Burrowing owl Athene cunicularia ?[114]LC[114]Decrease[114]
Buru boobook Ninox hantu ?[115]LC[115]Decrease[115]
Camiguin boobook Ninox leventisi 250-1,400[116]VU[116]Decrease[116]
Cape eagle-owl Bubo capensis ?[117]LC[117]Steady[117]
Cebu boobook Ninox rumseyi 250-999[118]VU[118]Steady[118]
Chaco owl Strix chacoensis ?[119]NT[119]Steady[119]
Chocolate boobook Ninox randi ?[120]NT[120]Decrease[120]
Cinnamon screech owl Megascops petersoni ?[121]LC[121]Decrease[121]
Cloud-forest screech owl Megascops marshalli ?[122]NT[122]Steady[122]
Collared owlet Glaucidium brodiei 10,000,000+[123]LC[123]Decrease[123]
Collared scops owl Outs lettia ?[124]LC[124]Steady[124]
Costa Rican pygmy owl Glaucidium costaricanum ?[125]LC[125]Steady[125]
Cuban pygmy owl Glaudicium siju ?[126]LC[126]Steady[126]
Cyprus scops owl Otus cyprius 10,000-24,000[127]LC[127]Steady[127]
Desert owl Strix hadorami ?[128]LC[128]Steady[128]
Dusky eagle-owl Bubo coromandus ?[129]LC[129]Decrease[129]
East Brazilian pygmy owl Glaucidium minutissimum ?[130]LC[130]Decrease[130]
Eastern screech owl Megascops asio 560,000[131]LC[131]Decrease[131]
Elf owl Micrathene whitneyi 72,000[132]LC[132]Decrease[132]
Everett's scops owl Otus everetti ?[133]LC[133]Decrease[133]
Ferruginous pygmy owl Glaucidium brasilianum 20,000,000[134]LC[134]Decrease[134]
Flammulated owl Psiloscops flammeolus ?[135]LC[135]Decrease[135]
Flores scops owl Otus alfredi 250-2,499[136]EN[136]Decrease[136]
Fraser's eagle-owl Bubo poensis ?[137]LC[137]Decrease[137]
Great horned owl Bubo virginianus ?[138]LC[138]Steady[138]
Greyish eagle-owl Bubo cinerascens ?[139]LC[139]Steady[139]
Guatemalan pygmy owl Glaucidium cobanense ?[140]LC[140]Decrease[140]
Halmahera boobook Ninox hypogramma ?[141]LC[141]Decrease[141]
Himalayan owl Strix nivicolum ?[142]LC[142]Steady[142]
Hume's boobook Ninox obscura ?[143]LC[143]Steady[143]
Indian eagle-owl Bubo bengalensis ?[144]LC[144]Steady[144]
Indian scops-owl Otus bakkamoena ?[145]LC[145]Steady[145]
Itombwe owl Phodilus prigoginei 2,500-9,999[146]EN[146]Decrease[146]
Jamaican owl Pseudoscops grammicus ?[147]LC[147]Decrease[147]
Japanese scops owl Otus semitorques ?[148]LC[148]Decrease[148]
Javan owlet Glacidium castanopterum ?[149]LC[149]Steady[149]
Jungle owlet Glaucidium radiatum ?[150]LC[150]Steady[150]
Koepcke's screech owl Megascops koepckeae ?[151]LC[151]Steady[151]
Lesser horned owl Bubo magellanicus ?[152]LC[152]Steady[152]
Long-tufted screech owl Megascops sanctaecatarinae ?[153]LC[153]Decrease[153]
Luzon boobook Ninox philippensis ?[154]LC[154]Decrease[154]
Luzon scops owl Otus longicornis ?[155]NC[155]Decrease[155]
Madagascar owl Asio madagascariensis ?[156]LC[156]Decrease[156]
Maned owl Jubula lettii ?[157]DD[157]Steady[157]
Manus boobook Ninox meeki ?[158]LC[158]Steady[158]
Marsh owl Asio capensis ?[159]LC[159]Steady[159]
Mayotte scops owl Otus mayottensis ?[160]LC[160]Steady[160]
Middle American screech owl Megascops guatemalae ?[161]LC[161]Decrease[161]

See also

References
  1. Hume, Julian P. (24 August 2017). Extinct Birds. ISBN 9781472937452.
  2. "Ninox albifacies". IUCN Red List of Threatened Species. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689496A93232295.en.
  3. "Mascarenotus sauzieri". IUCN Red List of Threatened Species. doi:10.2305/IUCN.UK.2016-3.RLTS.T22728861A94999192.en.
  4. "Mascarenotus grucheti". IUCN Red List of Threatened Species. doi:10.2305/IUCN.UK.2017-3.RLTS.T22728866A119424909.en"".{{cite iucn}}: error: malformed |doi= identifier (help)
  5. "Mascarenotus murivorus". IUCN Red List of Threatened Species. doi:10.2305/IUCN.UK.2016-3.RLTS.T22728856A94999047.en.
  6. IUCN (2019-08-06). "Glaucidium mooreorum: BirdLife International: The IUCN Red List of Threatened Species 2019: e.T22733081A156084939". doi:10.2305/iucn.uk.2019-3.rlts.t22733081a156084939.en.
  7. IUCN (2018-08-18). "Otus siaoensis: BirdLife International: The IUCN Red List of Threatened Species 2018: e.T22728599A134199532". IUCN Red List of Threatened Species. 2018-08-18. doi:10.2305/iucn.uk.2018-2.rlts.t22728599a134199532.en.
  8. IUCN (2017-10-01). "Otus capnodes: BirdLife International: The IUCN Red List of Threatened Species 2017: e.T22688686A119090936". IUCN Red List of Threatened Species. 2017-10-01. doi:10.2305/iucn.uk.2017-3.rlts.t22688686a119090936.en.
  9. IUCN (2018-08-06). "Heteroglaux blewitti: BirdLife International: The IUCN Red List of Threatened Species 2018: e.T22689335A132251554". IUCN Red List of Threatened Species. 2018-08-06. doi:10.2305/iucn.uk.2018-2.rlts.t22689335a132251554.en.
  10. IUCN (2016-10-01). "Otus thilohoffmanni: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22732040A95041044". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22732040a95041044.en.
  11. IUCN (2020-08-03). "Xenoglaux loweryi: BirdLife International: The IUCN Red List of Threatened Species 2020: e.T22689320A180768478". IUCN Red List of Threatened Species. 2020-08-03. doi:10.2305/iucn.uk.2020-3.rlts.t22689320a180768478.en.
  12. IUCN (2018-08-09). "Tyto novaehollandiae: BirdLife International: The IUCN Red List of Threatened Species 2018: e.T62172196A132190206". IUCN Red List of Threatened Species. 2018-08-09. doi:10.2305/iucn.uk.2018-2.rlts.t62172196a132190206.en.
  13. IUCN (2018-08-07). "Otus hartlaubi: BirdLife International: The IUCN Red List of Threatened Species 2018: e.T22688620A131460770". IUCN Red List of Threatened Species. 2018-08-07. doi:10.2305/iucn.uk.2018-2.rlts.t22688620a131460770.en.
  14. IUCN (2016-10-01). "Tyto nigrobrunnea: BirdLife International: The IUCN Red List of Threatened Species 2017: e.T22688449A110038609". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2017-1.rlts.t22688449a110038609.en.
  15. IUCN (2017-10-01). "Otus moheliensis: BirdLife International: The IUCN Red List of Threatened Species 2017: e.T22724585A118472254". IUCN Red List of Threatened Species. 2017-10-01. doi:10.2305/iucn.uk.2017-3.rlts.t22724585a118472254.en.
  16. IUCN (2016-10-01). "Ninox natalis: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22689452A93230899". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22689452a93230899.en.
  17. IUCN (2016-10-01). "Bubo blakistoni: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22689007A93214159". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22689007a93214159.en.
  18. IUCN (2020-07-17). "Otus pauliani: BirdLife International: The IUCN Red List of Threatened Species 2021: e.T22688694A179586821". IUCN Red List of Threatened Species. 2020-07-17. doi:10.2305/iucn.uk.2021-3.rlts.t22688694a179586821.en.
  19. IUCN (2016-10-01). "Glaucidium nubicola: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22724604A94873667". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22724604a94873667.en.
  20. IUCN (2016-10-01). "Otus angelinae: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22688591A93201974". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22688591a93201974.en.
  21. IUCN (2018-08-10). "Bubo shelleyi: BirdLife International: The IUCN Red List of Threatened Species 2018: e.T22688980A131104915". IUCN Red List of Threatened Species. 2018-08-10. doi:10.2305/iucn.uk.2018-2.rlts.t22688980a131104915.en.
  22. IUCN (2016-10-01). "Ninox burhani: BirdLife International: The IUCN Red List of Threatened Species 2017: e.T22732909A111289520". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2017-1.rlts.t22732909a111289520.en.
  23. IUCN (2016-10-01). "Bubo poensis: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22730030A95023684". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22730030a95023684.en.
  24. IUCN (2016-10-01). "Ninox strenua: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22689389A93229550". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22689389a93229550.en.
  25. IUCN (2021-10-05). "Glaucidium albertinum: BirdLife International: The IUCN Red List of Threatened Species 2022: e.T22689310A208604278". IUCN Red List of Threatened Species. 2021-10-05. doi:10.2305/iucn.uk.2022-1.rlts.t22689310a208604278.en.
  26. IUCN (2016-10-01). "Otus beccarii: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22724754A94877921". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22724754a94877921.en.
  27. IUCN (2021-09-10). "Ninox ios: BirdLife International: The IUCN Red List of Threatened Species 2022: e.T22728610A207662764". IUCN Red List of Threatened Species. 2021-09-10. doi:10.2305/iucn.uk.2022-1.rlts.t22728610a207662764.en.
  28. IUCN (2016-10-01). "Phodilus prigoginei: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22688529A93199883". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22688529a93199883.en.
  29. IUCN (2016-10-01). "Otus enganensis: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22724390A94864442". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22724390a94864442.en.
  30. IUCN (2016-10-01). "Otus gurneyi: BirdLife International: The IUCN Red List of Threatened Species 2017: e.T22688911A110372685". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2017-1.rlts.t22688911a110372685.en.
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  32. IUCN (2016-10-01). "Tyto inexspectata: BirdLife International: The IUCN Red List of Threatened Species 2016: e.T22688441A93197763". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/iucn.uk.2016-3.rlts.t22688441a93197763.en.
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  120. IUCN (2016-10-01). "Ninox randi". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22726321A94918597.en.
  121. IUCN (2016-10-01). "Megascops pertersoni". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688840A93209725.en.
  122. IUCN (2016-10-01). "Megascops marshalli". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688847A93209893.en.
  123. IUCN (2021-08-11). "Glaucidium brodiei". IUCN Red List of Threatened Species. 2021-08-11. doi:10.2305/IUCN.UK.2021-3.RLTS.T200290653A206387811.en.
  124. IUCN (2016-10-01). "Otus lettia". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2017-3.RLTS.T61855318A118498941.en.
  125. IUCN (2016-10-01). "Glaucidium costaricanum". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22729005A95003007.en.
  126. IUCN (2016-10-01). "Glaucidium siju". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689262A93224271.en.
  127. IUCN (2019-07-25). "Otus cyprius". IUCN Red List of Threatened Species. 2019-07-25. doi:10.2305/IUCN.UK.2019-3.RLTS.T155019839A155215276.en.
  128. IUCN (2016-10-01). "Strix hadorami". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2017-1.RLTS.T22689083A112418158.en.
  129. IUCN (2016-10-01). "Bubo coromandus". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688992A93213395.en.
  130. IUCN (2018-08-06). "Glaucidium minutissimum". IUCN Red List of Threatened Species. 2018-08-06. doi:10.2305/IUCN.UK.2018-2.RLTS.T22689240A130162980.en.
  131. IUCN (2019-08-06). "Megascops asio". IUCN Red List of Threatened Species. 2019-08-06. doi:10.2305/IUCN.UK.2019-3.RLTS.T155660662A152331179.en.
  132. IUCN (2020-02-19). "Micrathene whitneyi". IUCN Red List of Threatened Species. 2020-02-19. doi:10.2305/IUCN.UK.2021-3.RLTS.T22689325A168847632.en.
  133. IUCN (2016-10-02). "Otus everetti". IUCN Red List of Threatened Species. 2016-10-02. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725053A94884958.en.
  134. IUCN (2022-08-15). "Glaucidium brasilianum". IUCN Red List of Threatened Species. 2022-08-15.
  135. IUCN (2016-10-02). "Psiloscops flammeolus". IUCN Red List of Threatened Species. 2016-10-02. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688637A93203659.en.
  136. IUCN (2016-10-02). "Otus alfredi". IUCN Red List of Threatened Species. 2016-10-02. doi:10.2305/IUCN.UK.2016-3.RLTS.T22724396A94864662.en.
  137. IUCN (2016-10-02). "Fraser's eagle owl". IUCN Red List of Threatened Species. 2016-10-02. doi:10.2305/IUCN.UK.2016-3.RLTS.T22730030A95023684.en.
  138. IUCN (2016-10-01). "Bubo virginianus". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2018-2.RLTS.T61752071A132039486.en.
  139. IUCN (2016-10-01). "Bubo cinerascens". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T61741660A95178482.en.
  140. IUCN (2016-10-01). "Glaucidium cobanense". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T61791597A95181252.en.
  141. IUCN (2016-10-01). "Ninox hypogramma". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22727900A94965298.en.
  142. IUCN (2016-10-01). "Strix nivicolum". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725477A94893250.en.
  143. IUCN (2016-10-01). "Ninox obscura". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22726328A94918968.en.
  144. IUCN (2016-10-01). "Bubo bengalensis". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688934A93211525.en.
  145. IUCN (2016-10-01). "Otus bakkamoena". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T61855263A95182096.en.
  146. IUCN (2016-10-01). "Phodilus prigoginei". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688529A93199883.en.
  147. IUCN (2016-10-01). "Pseudoscops grammicus". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689501A93232472.en.
  148. IUCN (2016-10-01). "Otus semitorques". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T61859151A95233778.en.
  149. IUCN (2016-10-01). "Glacidium castanopterum". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689280A93225162.en.
  150. IUCN (2016-10-01). "Glaucidium radiatum". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689283A93225315.en.
  151. IUCN (2016-10-01). "Megascops koepckeae". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688782A93208561.en.
  152. IUCN (2016-10-01). "Bubo magellanicus". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T61752097A95179224.en.
  153. IUCN (2016-10-01). "Megascops sanctaecatarinae". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688874A93210328.en.
  154. IUCN (2016-10-01). "Ninox philippensis". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22725483A94893562.en.
  155. IUCN (2016-10-01). "Otus longicornis". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22688602A93202286.en.
  156. IUCN (2018-08-07). "Asio madagascariensis". IUCN Red List of Threatened Species. 2018-08-07. doi:10.2305/IUCN.UK.2018-2.RLTS.T22689517A130164463.en.
  157. IUCN (2016-10-01). "Jubula lettii". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689173A93220733.en.
  158. IUCN (2016-10-01). "Ninox meeki". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22689465A93231357.en.
  159. IUCN (2021-05-28). "Asio capensis". IUCN Red List of Threatened Species. 2021-05-28. doi:10.2305/IUCN.UK.2021-3.RLTS.T22689535A202174205.en.
  160. IUCN (2016-10-01). "Otus mayottensis". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T22732599A95047769.en.
  161. IUCN (2016-10-01). "Megascops guatemalae". IUCN Red List of Threatened Species. 2016-10-01. doi:10.2305/IUCN.UK.2016-3.RLTS.T61767847A95179450.en.
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