List of Apodiformes by population

This is a list of Apodiformes 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.

Members of Apodiformes include the swifts, treeswifts, and hummingbirds. Note that some ornithological authorities (e.g., IUCN/BirdLife International)[1] no longer recognize Apodiformes, and place all members within Caprimulgiformes. However, Apodiformes is maintained as a separate order here to match IOC taxonomy (IOC World Bird List version 15.1).[2] For more discussion of this taxonomic complex, see Strisores.

This list is not comprehensive, as not all Apodiformes have had their numbers quantified.

The IOC World Bird List (version 15.1) recognizes 480 species of Apodiformes, one of which is extinct.[3][4]

One member of Apodiformes is extinct:

Species by global population

Common name Binomial name Population Status Trend Notes Image
Turquoise-throated puffleg Eriocnemis godini 1-49[6] CR[6] ?[6] May be extinct; no confirmed records since only specimen was collected in 1850. Not classified as extinct due to unconfirmed record in 1976.[6]
Santa Marta sabrewing Campylopterus phainopeplus 1-49[7] CR[7] [7] Very few records exist, with less than 5 confirmed sightings since 1946.[7]
Blue-throated hillstar Oreotrochilus cyanolaemus 80-110[8] CR[8] [8] Subpopulations include 30-50 mature individuals in Cerro de Arcos and Moras, 30-40 in Guanazán and Burrourco, and <20 in Fierro Urco.[8]
Black-breasted puffleg Eriocnemis nigrivestis 100-150[9] EN[9] [9]
Chilean woodstar Eulidia yarrellii 210[10] CR[10] [10] Total population is estimated to be 316 individuals.[10]
Gorgeted puffleg Eriocnemis isabellae 250-999[11] CR[11] [11] Total population is estimated to be 900 individuals.[11]
Short-crested coquette Lophornis brachylophus 250-999[12] CR[12] [12] Total population is estimated to be 350-1,500 individuals.[12]
Perijá starfrontlet Coeligena consita 250-999[13] EN[13] [13] Total population is estimated to be 375-1,499 individuals.[13]
Colorful puffleg Eriocnemis mirabilis 250-999[14] EN[14] [14] Total population is estimated to be 350-1,500 individuals.[14]
Blue-bearded helmetcrest Oxypogon cyanolaemus 250-999[15] EN[15] [15]
Grey-bellied comet Taphrolesbia griseiventris 250-999[16] EN[16] [16] Total population is estimated to be 350-1,500 individuals.[16]
Buffy helmetcrest Oxypogon stuebelii 250-999[17] VU[17] [17] Precautionary estimate for mature individuals, acknowledging some studies have estimated a population as high as 10,000 mature individuals.[17]
Glittering starfrontlet

(Dusky starfrontlet)

Coeligena orina 250-2,499[18] EN[18] [18] Total population is estimated to be 1,554 individuals.[18]
Sapphire-bellied hummingbird Chrysuronia lilliae 285-440[19] EN[19] [19] Total population was estimated in 2007 to be 1,050 individuals. Likely lower now due to further declines.[19]
Atiu swiftlet Aerodramus sawtelli 340-400[20] VU[20] [20]
Santa Marta blossomcrown Anthocephala floriceps 500-2,500[21] VU[21] [21]
Oaxaca hummingbird Eupherusa cyanophrys 600-1,700[22] EN[22] [22] Total population is estimated to be 1,000-2,499 individuals.[22]
Dark-rumped swift Apus acuticauda 900-10,000[23] NT[23] [23]
Long-tailed woodnymph Thalurania watertonii 1,000-2,499[24] EN[24] [24]
Purple-backed sunbeam Aglaeactis aliciae 1,000-2,499[25] VU[25] [25] Total population is estimated to be 1,500-4,000 individuals.[25]
Violet-throated metaltail Metallura baroni 1,000-2,499[26] VU[26] [26]
Tres Marias hummingbird Cyanthus lawrencei 1,000-2,499[27] NT[27] [27] Preliminary estimate, actual population may be higher.[27]
Marvelous spatuletail Loddigesia mirabilis 1,000-2,499[28] NT[28] [28]
Esmeraldas woodstar Chaetocercus berlepschi 1,000-2,700[29] VU[29] [29] Total population is estimated to be 1,600-3,900 individuals.[29]
Tolima blossomcrown Anthocephala berlepschi 1,000-4,500[30] VU[30] [30]
Lyre-tailed hummingbird

(Inagua woodstar)

Nesophlox lyrura 1,000-4,999[31] LC[31] [31] Total population is estimated to "number in the low thousands."[31]
Juan Fernández firecrown Sephanoides fernandensis 1,500-3,500[32] CR[32] [32] Total population is estimated to be 2,298-5,263 individuals.[32]
Mangrove hummingbird Chrysuronia boucardi 1,500-7,000[33] EN[33] [33] Total population is estimated to be 2,500-9,999 individuals.[33]

IUCN/BirdLife International place this species in genus Amazilia.

Seychelles swiftlet Aerodramus elaphrus 1,700-2,000[34] VU[34] [34] Total population is estimated to be 2,500-3,000 individuals.[34]
Glow-throated hummingbird Selasphorus ardens 2,000-12,000[35] EN[35] [35] Estimate assumes 10% of suitable habitat is occupied. True population may be toward lower end of estimate.[35]
Outcrop sabrewing Campylopterus calcirupicola 2,400-15,000[36] VU[36] [36] Total population is estimated to be 3,600 - 22,000 individuals, assuming 10% occupancy of suitable habitat.[36]
Ashy-tailed swift Chaetura andrei 2,500-9,999[37] VU[37] [37] Preliminary estimate using known population density of a congeneric species (C. spinicaudus).[37]
Hook-billed hermit Glaucis dohrnii 2,500-9,999[38] VU[38] [38] Total population is estimated to be 2,800-24,000 individuals, but is expected to be toward the lower arm due to the species' habitat needs.[38]
Wedge-tailed hillstar Oreotrochilus adela 2,500-9,999[39] LC[39] [39] Total population is estimated to be, at most, 15,200 individuals.[39]
Scissor-tailed hummingbird Hylonympha macrocerca 3,000-4,000[40] EN[40] [40] Total population is estimated to be 5,000-6,000 individuals.[40]
Mariana swiftlet Aerodramus bartschi 3,000-5,000[41] VU[41] [41] Total population (excluding introduced population on O'ahu) is 5,200 individuals.[41]
Royal sunangel Heliangelus regalis 3,000-8,999[42] NT[42] [42] Total population is estimated to be 5,000-12,500 individuals, combining population estimates from Ecuador (2,500) and Peru (2,500-10,000).[42]
Little woodstar Chaetocercus bombus 5,000-19,999[43] NT[43] [43]
White-bearded helmetcrest Oxypogon lindenii 5,000-25,000[44] NT[44] ?[44]
Mexican sheartail Doricha eliza 5,600-8,300[45] NT[45] [45] Total population is estimated to be 8,500-12,500 individuals.[45]
Mexican woodnymph Eupherusa ridgwayi 6,000-15,000[46] VU[46] [46] Total population is estimated to be 10,000-19,999 individuals.[46]
White-tailed hummingbird Eupherusa poliocerca 6,000-15,000[47] NT[47] [47] Total population is estimated to be 10,000-19,999 individuals.[47]
Black inca Coeligena prunellei 7,500[48] VU[48] [48] Total population is estimated to be 11,250 individuals.[48]
Philippine spinetail Mearnsia picina >10,000[49] NT[49] [49] Population of mature individuals is "not thought to number fewer than 10,000."[49]
Honduran emerald Amazilia luciae 10,000-19,999[50] VU[50] [50]
Mascarene swiftlet Aerodramus francicus 10,000-19,999[51] NT[51] [51] Preliminary estimates based on counts for colonies on Mauritius and the Réunion archipelago.[51]
Chestnut-bellied hummingbird Saucerottia castaneiventris 10,000-19,999[52] NT[52] [52] A recent study estimated population to be as high as 117,733 mature individuals, so values given may be a large underestimate.[53][52]
Koepcke's hermit Phaethornis koepckeae 13,000-57,000[54] LC[54] [54] Total population is estimated to be 20,000-86,000 individuals.[54]
Perijá metaltail Metallura iracunda 14,000-37,000[55] NT[55] [55] Total population is estimated to be 21,250-55,250 individuals.[55]
Plain swift Apus unicolor 15,000-40,000[56] LC[56] ?[56]
White-fronted swift Cypseloides storeri 20,000-49,999[57] DD[57] ?[57] Trend and assessment are unknown due to uncertainties regarding this species' habitat requirements.[57]
Emerald-chinned hummingbird Abeillia abeillei 20,000-49,999[58] LC[58] [58]
Veraguas mango

(Veraguan mango)

Anthracothorax veraguensis 20,000-49,999[59] LC[59] [59]
Green mango Anthracothorax viridis 20,000-49,999[60] LC[60] [60]
Xantus's hummingbird Basilinna xantusii 20,000-49,999[61] LC[61] [61]
Beautiful hummingbird

(Beautiful sheartail)

Calothorax pulcher 20,000-49,999[62] LC[62] [62]
Costa Rican swift Chaetura fumosa 20,000-49,999[63] LC[63] [63]
Humboldt's hummingbird

(Humboldt's sapphire)

Chrysuronia humboldtii 20,000-49,999[64] LC[64] [64]
Cozumel emerald Cynanthus forficatus 20,000-49,999[65] LC[65] [65]
White-chinned swift Cypseloides cryptus 20,000-49,999[66] LC[66] [66]
Slender sheartail Doricha enicura 20,000-49,999[67] LC[67] [67]
White-bellied mountain-gem Lampornis hemileucus 20,000-49,999[68] LC[68] [68]
Garnet-throated hummingbird Lamprolaima rhami 20,000-49,999[69] LC[69] [69]
White-crested coquette Lophornis adorabilis 20,000-49,999[70] LC[70] [70]
Black-crested coquette Lophornis helenae 20,000-49,999[71] LC[71] [71]
White-tailed emerald Microchera chionura 20,000-49,999[72] LC[72] [72]
Coppery-headed emerald Microchera cupreiceps 20,000-49,999[73] LC[73] [73]
Rufous sabrewing Pampa rufus 20,000-49,999[74] LC[74] [74]
Great swallow-tailed swift Panyptila sanctihieronymi 20,000-49,999[75] LC[75] [75]
Mexican hermit Phaethornis mexicanus 20,000-49,999[76] LC[76] [76]
Magenta-throated woodstar Philodice bryantae 20,000-49,999[77] LC[77] [77]
Purple-throated woodstar Philodice mitchellii 20,000-49,999[78] LC[78] [78]
Wine-throated hummingbird Selasphorus ellioti 20,000-49,999[79] LC[79] [79]
Volcano hummingbird Selasphorus flammula 20,000-49,999[80] LC[80] [80]
Scintillant hummingbird Selasphorus scintilla 20,000-49,999[81] LC[81] [81]
Sparkling-tailed woodstar Tilmatura dupontii 20,000-49,999[82] LC[82] [82]
Bee hummingbird Mellisuga helenae 22,000-66,000[83] NT[83] [83]
Blue-headed hummingbird Riccordia bicolor 25,000-150,000[84] NT[84] [84]
Dot-eared coquette Lophornis gouldii 28,000-376,000[85] NT[85] [85] Total population is tentatively estimated to be 43,000 - 563,000 individuals, assuming that 5-10% of suitable habitat is occupied.[85]
Puerto Rican emerald Riccordia maugaeus 30,000-39,999[86] LC[86] [86]
Hooded visorbearer Augastes lumachella 35,000-100,000[87] NT[87] [87]
White-tailed sabrewing Campylopterus ensipennis 50,000-99,999[88] NT[88] [88]
Spot-fronted swift Cypseloides cherriei 50,000-99,999[89] LC[89] [89] May be an underestimate, given the frequency of observations.[89]
Violet sabrewing Campylopterus hemileucurus 50,000-499,999[90] LC[90] [90]
Chapman's swift Chaetura chapmani 50,000-499,999[91] LC[91] [91]
Blue-throated goldentail

(Blue-throated sapphire)

Chlorestes eliciae 50,000-499,999[92] LC[92] [92]
Violet-bellied hummingbird Chlorestes julie 50,000-499,999[93] LC[93] [93]
Garden emerald Chlorostilbon assimilis 50,000-499,999[94] LC[94] [94]
Sapphire-throated hummingbird Chrysuronia coeruleogularis 50,000-499,999[95] LC[95] [95]
Golden-crowned emerald Cynanthus auriceps 50,000-499,999[96] LC[96] [96]
Stripe-tailed hummingbird Eupherusa eximia 50,000-499,999[97] LC[97] [97]
Black-bellied hummingbird Eupherusa nigriventris 50,000-499,999[98] LC[98] [98]
White-tipped sicklebill Eutoxeres aquila 50,000-499,999[99] LC[99] [99]
Amethyst-throated mountain-gem Lampornis amethystinus 50,000-499,999[100] LC[100] [100]
Purple-throated mountain-gem Lampornis calolaemus 50,000-499,999[101] LC[101] [101]
Green-throated mountain-gem Lampornis viridipallens 50,000-499,999[102] LC[102] [102]
Rufous-crested coquette Lophornis delattrei 50,000-499,999[103] LC[103] [103]
Snowcap Microchera albocoronata 50,000-499,999[104] LC[104] [104]
Plain-capped starthroat Heliomaster constantii 50,000-499,999[105] LC[105] [105]
Purple-crowned fairy Heliothryx barroti 50,000-499,999[106] LC[106] [106] Values given are for total population.[106]
Fiery-throated hummingbird Panterpe insignis 50,000-499,999[107] LC[107] [107]
Scaly-breasted sabrewing

(Scaly-breasted hummingbird)

Phaeochroa cuvierii 50,000-499,999[108] LC[108] [108]
Dusky hummingbird Phaeoptila sordidus 50,000-499,999[109] LC[109] [109]
Stripe-throated hermit Phaethornis striigularis 50,000-499,999[110] LC[110] [110]
White-whiskered hermit Phaethornis yaruqui 50,000-499,999[111] LC[111] [111]
Charming hummingbird Polyerata decora 50,000-499,999[112] LC[112] [112]
Blue-tailed hummingbird Saucerottia cyanura 50,000-499,999[113] LC[113] [113]
Snowy-bellied hummingbird Saucerottia edward 50,000-499,999[114] LC[114] [114]
Bumblebee hummingbird Selasphorus heloisa 50,000-499,999[115] LC[115] [115]
White-naped swift Streptoprocne semicollaris 50,000-499,999[116] LC[116] [116]
Tooth-billed hummingbird Androdon aequatorialis 52,000-87,000[117] LC[117] [117] Total population is estimated to be 78,000-130,000 individuals.[117]
Caroline swiftlet Aerodramus inquietus 83,500[118] LC[118] [118] Value given is 1999 estimate for total population, excluding population on Yap. Value should therefore be considered an underestimate.[118]
Black swift

(American black swift)

Cypseloides niger 170,000[119] VU[119] [119]
Saw-billed hermit Ramphodon naevius 175,000-1,710,000[120] LC[120] [120] Total population is tentatively estimated to be 262,000 - 2,560,000 individuals, assuming 5-25% of suitable habitat is occupied.[120]
Lucifer hummingbird

(Lucifer sheartail)

Calothorax lucifer 200,000[121] LC[121] [121]
Greenish puffleg Haplophaedia aureliae 336,000-570,000[122] LC[122] [122]
Cinnamon hummingbird Amazilia rutila 500,000-4,999,999[123] LC[123] [123]
Green-breasted mango Anthracothorax prevostii 500,000-4,999,999[124] LC[124] [124]
Band-rumped swift Chaetura spinicaudus 500,000-4,999,999[125] LC[125] [125]
White-vented plumeleteer Chalybura buffonii 500,000-4,999,999[126] LC[126] [126]
Bronze-tailed plumeleteer Chalybura urochrysia 500,000-4,999,999[127] LC[127] [127]
White-bellied emerald Chlorestes candida 500,000-4,999,999[128] LC[128] [128]
Brown violetear Colibri delphinae 500,000-4,999,999[129] LC[129] [129]
Canivet's emerald Cynanthus canivetii 500,000-4,999,999[130] LC[130] [130]
Green-fronted lancebill Doryfera ludovicae 500,000-4,999,999[131] LC[131] [131]
Bronzy hermit Glaucis aeneus 500,000-4,999,999[132] LC[132] [132]
Green-crowned brilliant Heliodoxa jacula 500,000-4,999,999[133] LC[133] [133]
Long-billed starthroat Heliomaster longirostris 500,000-4,999,999[134] LC[134] [134]
Violet-headed hummingbird Klais guimeti 500,000-4,999,999[135] LC[135] [135]
Green hermit Phaethornis guy 500,000-4,999,999[136] LC[136] [136]
Blue-chested hummingbird Polyerata amabilis 500,000-4,999,999[137] LC[137] [137]
Azure-crowned hummingbird Saucerottia cyanocephala 500,000-4,999,999[138] LC[138] [138]
Steely-vented hummingbird Saucerottia saucerottei 500,000-4,999,999[139] LC[139] [139] IOC taxonomy splits an additional species, the blue-vented hummingbird (S. hoffmanni) from this one.[3]

IUCN/BirdLife International include both species within S. saucerottei.[1]

Lesser swallow-tailed swift Panyptila cayennensis 500,000-4,999,999[140] LC[140] [140]
Pale-bellied hermit Phaethornis anthophilus 500,000-4,999,999[141] LC[141] [141]
Chestnut-collared swift Streptoprocne rutila 500,000-4,999,999[142] LC[142] [142]
Band-tailed barbthroat Threnetes ruckeri 500,000-4,999,999[143] LC[143] [143]
Buff-bellied hummingbird Amazilia yucatanensis 610,000[144] LC[144] ?[144]
Pallid swift Apus pallidus 800,000-1,499,999[145] LC[145] [145] Preliminary estimate extrapolated from European data, which represents 15% of population.[145]
Vaux's swift Chaetura vauxi 860,000[146] LC[146] [146]
Allen's hummingbird Selasphorus sasin 1,500,000[147] LC[147] [147]
White-eared hummingbird Basilinna leucotis 2,000,000[148] LC[148] [148]
Magnificent hummingbird

(Rivoli's hummingbird)

Eugenes fulgens 2,000,000[149] LC[149] [149]
Blue-throated mountain-gem Lampornis clemenciae 2,000,000[150] LC[150] [150]
Violet-crowned hummingbird Ramosomyia violiceps 2,000,000[151] LC[151] [151] IUCN/BirdLife International place this species in genus Leucolia.
Berylline hummingbird Saucerottia beryllina 2,000,000[152] LC[152] [152]
Alpine swift Tachymarptis melba 2,160,000-4,870,000[153] LC[153] ?[153] Preliminary estimate extrapolated from European data, which represents 30% of population.[153]
Grey-breasted sabrewing Campylopterus largipennis 3,000,000-13,000,000[154] LC[154] [154] Total population is estimated to be 4,000,000-20,000,000 individuals.[154]
White-throated swift Aeronautes saxatalis 3,200,000[155] LC[155] [155]
Costa's hummingbird Calypte costae 3,400,000[156] LC[156] [156]
Calliope hummingbird Selasphorus calliope 4,500,000[157] LC[157] [157]
Crowned woodnymph Thalurania colombica 5,000,000-49,999,999[158] LC[158] [158]
Rufous-tailed hummingbird Amazilia tzacatl 5,000,000-50,000,000[159] LC[159] [159]
Black-throated mango Anthracothorax nigricollis 5,000,000-50,000,000[160] LC[160] [160]
Short-tailed swift Chaetura brachyura 5,000,000-50,000,000[161] LC[161] [161]
White-necked jacobin Florisuga mellivora 5,000,000-50,000,000[162] LC[162] [162]
Rufous-breasted hermit Glaucis hirsutus 5,000,000-50,000,000[163] LC[163] [163]
White-collared swift Streptoprocne zonaris 5,000,000-50,000,000[164] LC[164] [164]
Chimney swift Chaetura pelagica 7,700,000[165] VU[165] [165] Total population is estimated to be 15,000,000 individuals.[165]
Black-chinned hummingbird Archilochus alexandri 8,800,000[166] LC[166] [166]
Anna's hummingbird Calypte anna 9,600,000[167] LC[167] [167]
Broad-tailed hummingbird Selasphorus platycercus 9,800,000[168] LC[168] [168]
Rufous hummingbird Selasphorus rufus 22,000,000[169] NT[169] [169]
Ruby-throated hummingbird Archilochus colubris 36,000,000[170] LC[170] [170]
Grey-rumped swift Chaetura cinereiventris 50,000,000[171] LC[171] [171]
Common swift Apus apus 80,000,000-142,000,000[172] LC[172] [172] Preliminary estimate extrapolated from European data, which represents 40% of population.[172]

Species without population estimates

Common name Binomial name Population Status Trend Notes Image
Venezuelan sylph Aglaiocercus berlepschi unknown[173] EN[173] [173]
Green violetear

(Mexican violetear)

Colibri thalassinus unknown[174] LC[174] [174] IOC taxonomy splits an additional species, the lesser violetear (C. cyanotus) from this species.[3]

IUCN/BirdLife International maintain both species within C. thalassinus.[1]

Rothschild's swift Cypseloides rothschildi unknown[175] LC[175] [175]
Neblina metaltail Metallura odomae unknown[176] LC[176] [176] Species was previously reported to have ~6,700 mature individuals (10,000 total individuals).[177] In the interim, this preliminary estimate has been rescinded.[176]

See also

References

  1. ^ a b c Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 10. BirdLife International. 2025.
  2. ^ "Orders of Birds – IOC World Bird List". www.worldbirdnames.org. Retrieved 2026-01-19.
  3. ^ a b c "Hummingbirds – IOC World Bird List". www.worldbirdnames.org. Retrieved 2026-01-22.
  4. ^ "Owlet-nightjars, treeswifts, swifts – IOC World Bird List". www.worldbirdnames.org. Retrieved 2026-01-22.
  5. ^ BirdLife International (2022). "Riccordia bracei". IUCN Red List of Threatened Species. 2022 e.T22687333A208112544. doi:10.2305/IUCN.UK.2022-2.RLTS.T22687333A208112544.en.
  6. ^ a b c d BirdLife International (2020). "Eriocnemis godini". IUCN Red List of Threatened Species. 2020 e.T22687922A182244989. doi:10.2305/iucn.uk.2020-3.rlts.t22687922a182244989.en.
  7. ^ a b c d BirdLife International (2020). "Campylopterus phainopeplus". IUCN Red List of Threatened Species. 2020 e.T22687086A181107620. doi:10.2305/iucn.uk.2020-3.rlts.t22687086a181107620.en.
  8. ^ a b c d BirdLife International (2021). "Oreotrochilus cyanolaemus". IUCN Red List of Threatened Species. 2021 e.T200250452A200270409. doi:10.2305/IUCN.UK.2021-3.RLTS.T200250452A200270409.en.
  9. ^ a b c BirdLife International (2020). "Eriocnemis nigrivestis". IUCN Red List of Threatened Species. 2020 e.T22687909A173319425. doi:10.2305/IUCN.UK.2020-3.RLTS.T22687909A173319425.en.
  10. ^ a b c d BirdLife International (2020). "Eulidia yarrellii". IUCN Red List of Threatened Species. 2020 e.T22688244A181468935. doi:10.2305/IUCN.UK.2020-3.RLTS.T22688244A181468935.en.
  11. ^ a b c d BirdLife International (2018). "Eriocnemis isabellae". IUCN Red List of Threatened Species. 2018 e.T22735457A126225505. doi:10.2305/IUCN.UK.2018-2.RLTS.T22735457A126225505.en.
  12. ^ a b c d BirdLife International (2018). "Lophornis brachylophus". IUCN Red List of Threatened Species. 2018 e.T22687196A130649157. doi:10.2305/IUCN.UK.2018-2.RLTS.T22687196A130649157.en.
  13. ^ a b c d BirdLife International (2020). "Coeligena consita". IUCN Red List of Threatened Species. 2020 e.T61173094A180037357. doi:10.2305/IUCN.UK.2020-3.RLTS.T61173094A180037357.en.
  14. ^ a b c d BirdLife International (2017). "Eriocnemis mirabilis". IUCN Red List of Threatened Species. 2017 e.T22687939A118473368. doi:10.2305/iucn.uk.2017-3.rlts.t22687939a118473368.en.
  15. ^ a b c BirdLife International (2023). "Oxypogon cyanolaemus". IUCN Red List of Threatened Species. 2023 e.T22726798A231532177. doi:10.2305/IUCN.UK.2023-1.RLTS.T22726798A231532177.en.
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  17. ^ a b c d BirdLife International (2021). "Oxypogon stuebelii". IUCN Red List of Threatened Species. 2021 e.T22726810A190694196. doi:10.2305/IUCN.UK.2021-3.RLTS.T22726810A190694196.en.
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