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 no longer recognize Apodiformes, and place all members within Caprimulgiformes. However, Apodiformes is maintained as a separate order here to match IOC taxonomy. 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 recognizes 480 species of Apodiformes, one of which is extinct.
One member of Apodiformes is extinct:

Brace's emerald - went extinct circa 1877.

Species by global population

Common name	Binomial name	Population	Status	Trend	Notes	Image
Turquoise-throated puffleg	Eriocnemis godini	1-49		?	May be extinct; no confirmed records since only specimen was collected in 1850. Not classified as extinct due to unconfirmed record in 1976.
Santa Marta sabrewing	Campylopterus phainopeplus	1-49			Very few records exist, with less than 5 confirmed sightings since 1946.
Blue-throated hillstar	Oreotrochilus cyanolaemus	80-110			Subpopulations include 30-50 mature individuals in Cerro de Arcos and Moras, 30-40 in Guanazán and Burrourco, and <20 in Fierro Urco.
Black-breasted puffleg	Eriocnemis nigrivestis	100-150
Chilean woodstar	Eulidia yarrellii	210			Total population is estimated to be 316 individuals.
Gorgeted puffleg	Eriocnemis isabellae	250-999			Total population is estimated to be 900 individuals.
Short-crested coquette	Lophornis brachylophus	250-999			Total population is estimated to be 350-1,500 individuals.
Perijá starfrontlet	Coeligena consita	250-999			Total population is estimated to be 375-1,499 individuals.
Colorful puffleg	Eriocnemis mirabilis	250-999			Total population is estimated to be 350-1,500 individuals.
Blue-bearded helmetcrest	Oxypogon cyanolaemus	250-999
Grey-bellied comet	Taphrolesbia griseiventris	250-999			Total population is estimated to be 350-1,500 individuals.
Buffy helmetcrest	Oxypogon stuebelii	250-999			Precautionary estimate for mature individuals, acknowledging some studies have estimated a population as high as 10,000 mature individuals.
Glittering starfrontlet	Coeligena orina	250-2,499			Total population is estimated to be 1,554 individuals.
Sapphire-bellied hummingbird	Chrysuronia lilliae	285-440			Total population was estimated in 2007 to be 1,050 individuals. Likely lower now due to further declines.
Atiu swiftlet	Aerodramus sawtelli	340-400
Santa Marta blossomcrown	Anthocephala floriceps	500-2,500
Oaxaca hummingbird	Eupherusa cyanophrys	600-1,700			Total population is estimated to be 1,000-2,499 individuals.	175px
Dark-rumped swift	Apus acuticauda	900-10,000
Long-tailed woodnymph	Thalurania watertonii	1,000-2,499
Purple-backed sunbeam	Aglaeactis aliciae	1,000-2,499			Total population is estimated to be 1,500-4,000 individuals.
Violet-throated metaltail	Metallura baroni	1,000-2,499
Tres Marias hummingbird	Cyanthus lawrencei	1,000-2,499			Preliminary estimate, actual population may be higher.
Marvelous spatuletail	Loddigesia mirabilis	1,000-2,499
Esmeraldas woodstar	Chaetocercus berlepschi	1,000-2,700			Total population is estimated to be 1,600-3,900 individuals.
Tolima blossomcrown	Anthocephala berlepschi	1,000-4,500
Lyre-tailed hummingbird	Nesophlox lyrura	1,000-4,999			Total population is estimated to "number in the low thousands."
Juan Fernández firecrown	Sephanoides fernandensis	1,500-3,500			Total population is estimated to be 2,298-5,263 individuals.	175px
Mangrove hummingbird	Chrysuronia boucardi	1,500-7,000			Total population is estimated to be 2,500-9,999 individuals. IUCN/BirdLife International place this species in genus Amazilia.
Seychelles swiftlet	Aerodramus elaphrus	1,700-2,000			Total population is estimated to be 2,500-3,000 individuals.
Glow-throated hummingbird	Selasphorus ardens	2,000-12,000			Estimate assumes 10% of suitable habitat is occupied. True population may be toward lower end of estimate.	175px
Outcrop sabrewing	Campylopterus calcirupicola	2,400-15,000			Total population is estimated to be 3,600 - 22,000 individuals, assuming 10% occupancy of suitable habitat.
Ashy-tailed swift	Chaetura andrei	2,500-9,999			Preliminary estimate using known population density of a congeneric species.
Hook-billed hermit	Glaucis dohrnii	2,500-9,999			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.
Wedge-tailed hillstar	Oreotrochilus adela	2,500-9,999			Total population is estimated to be, at most, 15,200 individuals.
Scissor-tailed hummingbird	Hylonympha macrocerca	3,000-4,000			Total population is estimated to be 5,000-6,000 individuals.
Mariana swiftlet	Aerodramus bartschi	3,000-5,000			Total population is 5,200 individuals.
Royal sunangel	Heliangelus regalis	3,000-8,999			Total population is estimated to be 5,000-12,500 individuals, combining population estimates from Ecuador and Peru.
Little woodstar	Chaetocercus bombus	5,000-19,999
White-bearded helmetcrest	Oxypogon lindenii	5,000-25,000		?
Mexican sheartail	Doricha eliza	5,600-8,300			Total population is estimated to be 8,500-12,500 individuals.	175px
Mexican woodnymph	Eupherusa ridgwayi	6,000-15,000			Total population is estimated to be 10,000-19,999 individuals.
White-tailed hummingbird	Eupherusa poliocerca	6,000-15,000			Total population is estimated to be 10,000-19,999 individuals.
Black inca	Coeligena prunellei	7,500			Total population is estimated to be 11,250 individuals.
Philippine spinetail	Mearnsia picina	>10,000			Population of mature individuals is "not thought to number fewer than 10,000."
Honduran emerald	Amazilia luciae	10,000-19,999				175px
Mascarene swiftlet	Aerodramus francicus	10,000-19,999			Preliminary estimates based on counts for colonies on Mauritius and the Réunion archipelago.	175px
Chestnut-bellied hummingbird	Saucerottia castaneiventris	10,000-19,999			A recent study estimated population to be as high as 117,733 mature individuals, so values given may be a large underestimate.
Koepcke's hermit	Phaethornis koepckeae	13,000-57,000			Total population is estimated to be 20,000-86,000 individuals.	175px
Perijá metaltail	Metallura iracunda	14,000-37,000			Total population is estimated to be 21,250-55,250 individuals.
Plain swift	Apus unicolor	15,000-40,000		?
White-fronted swift	Cypseloides storeri	20,000-49,999		?	Trend and assessment are unknown due to uncertainties regarding this species' habitat requirements.
Emerald-chinned hummingbird	Abeillia abeillei	20,000-49,999
Veraguas mango	Anthracothorax veraguensis	20,000-49,999
Green mango	Anthracothorax viridis	20,000-49,999
Xantus's hummingbird	Basilinna xantusii	20,000-49,999
Beautiful hummingbird	Calothorax pulcher	20,000-49,999
Costa Rican swift	Chaetura fumosa	20,000-49,999
Humboldt's hummingbird	Chrysuronia humboldtii	20,000-49,999
Cozumel emerald	Cynanthus forficatus	20,000-49,999
White-chinned swift	Cypseloides cryptus	20,000-49,999
Slender sheartail	Doricha enicura	20,000-49,999
White-bellied mountain-gem	Lampornis hemileucus	20,000-49,999
Garnet-throated hummingbird	Lamprolaima rhami	20,000-49,999
White-crested coquette	Lophornis adorabilis	20,000-49,999
Black-crested coquette	Lophornis helenae	20,000-49,999
White-tailed emerald	Microchera chionura	20,000-49,999
Coppery-headed emerald	Microchera cupreiceps	20,000-49,999
Rufous sabrewing	Pampa rufus	20,000-49,999				175px
Great swallow-tailed swift	Panyptila sanctihieronymi	20,000-49,999
Mexican hermit	Phaethornis mexicanus	20,000-49,999
Magenta-throated woodstar	Philodice bryantae	20,000-49,999
Purple-throated woodstar	Philodice mitchellii	20,000-49,999
Wine-throated hummingbird	Selasphorus ellioti	20,000-49,999
Volcano hummingbird	Selasphorus flammula	20,000-49,999
Scintillant hummingbird	Selasphorus scintilla	20,000-49,999
Sparkling-tailed woodstar	Tilmatura dupontii	20,000-49,999
Bee hummingbird	Mellisuga helenae	22,000-66,000
Blue-headed hummingbird	Riccordia bicolor	25,000-150,000
Dot-eared coquette	Lophornis gouldii	28,000-376,000			Total population is tentatively estimated to be 43,000 - 563,000 individuals, assuming that 5-10% of suitable habitat is occupied.
Puerto Rican emerald	Riccordia maugaeus	30,000-39,999
Hooded visorbearer	Augastes lumachella	35,000-100,000
White-tailed sabrewing	Campylopterus ensipennis	50,000-99,999
Spot-fronted swift	Cypseloides cherriei	50,000-99,999			May be an underestimate, given the frequency of observations.
Violet sabrewing	Campylopterus hemileucurus	50,000-499,999				175px
Chapman's swift	Chaetura chapmani	50,000-499,999
Blue-throated goldentail	Chlorestes eliciae	50,000-499,999
Violet-bellied hummingbird	Chlorestes julie	50,000-499,999
Garden emerald	Chlorostilbon assimilis	50,000-499,999
Sapphire-throated hummingbird	Chrysuronia coeruleogularis	50,000-499,999
Golden-crowned emerald	Cynanthus auriceps	50,000-499,999
Stripe-tailed hummingbird	Eupherusa eximia	50,000-499,999				175px
Black-bellied hummingbird	Eupherusa nigriventris	50,000-499,999
White-tipped sicklebill	Eutoxeres aquila	50,000-499,999
Amethyst-throated mountain-gem	Lampornis amethystinus	50,000-499,999
Purple-throated mountain-gem	Lampornis calolaemus	50,000-499,999
Green-throated mountain-gem	Lampornis viridipallens	50,000-499,999
Rufous-crested coquette	Lophornis delattrei	50,000-499,999
Snowcap	Microchera albocoronata	50,000-499,999
Plain-capped starthroat	Heliomaster constantii	50,000-499,999
Purple-crowned fairy	Heliothryx barroti	50,000-499,999			Values given are for total population.	175px
Fiery-throated hummingbird	Panterpe insignis	50,000-499,999
Scaly-breasted sabrewing	Phaeochroa cuvierii	50,000-499,999
Dusky hummingbird	Phaeoptila sordidus	50,000-499,999
Stripe-throated hermit	Phaethornis striigularis	50,000-499,999				175px
White-whiskered hermit	Phaethornis yaruqui	50,000-499,999
Charming hummingbird	Polyerata decora	50,000-499,999
Blue-tailed hummingbird	Saucerottia cyanura	50,000-499,999
Snowy-bellied hummingbird	Saucerottia edward	50,000-499,999
Bumblebee hummingbird	Selasphorus heloisa	50,000-499,999
White-naped swift	Streptoprocne semicollaris	50,000-499,999
Tooth-billed hummingbird	Androdon aequatorialis	52,000-87,000			Total population is estimated to be 78,000-130,000 individuals.
Caroline swiftlet	Aerodramus inquietus	83,500			Value given is 1999 estimate for total population, excluding population on Yap. Value should therefore be considered an underestimate.
Black swift	Cypseloides niger	170,000
Saw-billed hermit	Ramphodon naevius	175,000-1,710,000			Total population is tentatively estimated to be 262,000 - 2,560,000 individuals, assuming 5-25% of suitable habitat is occupied.
Lucifer hummingbird	Calothorax lucifer	200,000
Greenish puffleg	Haplophaedia aureliae	336,000-570,000
Cinnamon hummingbird	Amazilia rutila	500,000-4,999,999				175px
Green-breasted mango	Anthracothorax prevostii	500,000-4,999,999
Band-rumped swift	Chaetura spinicaudus	500,000-4,999,999
White-vented plumeleteer	Chalybura buffonii	500,000-4,999,999
Bronze-tailed plumeleteer	Chalybura urochrysia	500,000-4,999,999
White-bellied emerald	Chlorestes candida	500,000-4,999,999				175px
Brown violetear	Colibri delphinae	500,000-4,999,999
Canivet's emerald	Cynanthus canivetii	500,000-4,999,999
Green-fronted lancebill	Doryfera ludovicae	500,000-4,999,999
Bronzy hermit	Glaucis aeneus	500,000-4,999,999
Green-crowned brilliant	Heliodoxa jacula	500,000-4,999,999
Long-billed starthroat	Heliomaster longirostris	500,000-4,999,999
Violet-headed hummingbird	Klais guimeti	500,000-4,999,999
Green hermit	Phaethornis guy	500,000-4,999,999
Blue-chested hummingbird	Polyerata amabilis	500,000-4,999,999
Azure-crowned hummingbird	Saucerottia cyanocephala	500,000-4,999,999
Steely-vented hummingbird	Saucerottia saucerottei	500,000-4,999,999			IOC taxonomy splits an additional species, the blue-vented hummingbird from this one. IUCN/BirdLife International include both species within S. saucerottei.
Lesser swallow-tailed swift	Panyptila cayennensis	500,000-4,999,999				175px
Pale-bellied hermit	Phaethornis anthophilus	500,000-4,999,999
Chestnut-collared swift	Streptoprocne rutila	500,000-4,999,999				175px
Band-tailed barbthroat	Threnetes ruckeri	500,000-4,999,999
Buff-bellied hummingbird	Amazilia yucatanensis	610,000		?
Pallid swift	Apus pallidus	800,000-1,499,999			Preliminary estimate extrapolated from European data, which represents 15% of population.	175px
Vaux's swift	Chaetura vauxi	860,000
Allen's hummingbird	Selasphorus sasin	1,500,000
White-eared hummingbird	Basilinna leucotis	2,000,000
Magnificent hummingbird	Eugenes fulgens	2,000,000
Blue-throated mountain-gem	Lampornis clemenciae	2,000,000
Violet-crowned hummingbird	Ramosomyia violiceps	2,000,000			IUCN/BirdLife International place this species in genus Leucolia.
Berylline hummingbird	Saucerottia beryllina	2,000,000
Alpine swift	Tachymarptis melba	2,160,000-4,870,000		?	Preliminary estimate extrapolated from European data, which represents 30% of population.	175px
Grey-breasted sabrewing	Campylopterus largipennis	3,000,000-13,000,000			Total population is estimated to be 4,000,000-20,000,000 individuals.
White-throated swift	Aeronautes saxatalis	3,200,000
Costa's hummingbird	Calypte costae	3,400,000
Calliope hummingbird	Selasphorus calliope	4,500,000
Crowned woodnymph	Thalurania colombica	5,000,000-49,999,999
Rufous-tailed hummingbird	Amazilia tzacatl	5,000,000-50,000,000				175px
Black-throated mango	Anthracothorax nigricollis	5,000,000-50,000,000
Short-tailed swift	Chaetura brachyura	5,000,000-50,000,000
White-necked jacobin	Florisuga mellivora	5,000,000-50,000,000				175px
Rufous-breasted hermit	Glaucis hirsutus	5,000,000-50,000,000
White-collared swift	Streptoprocne zonaris	5,000,000-50,000,000
Chimney swift	Chaetura pelagica	7,700,000			Total population is estimated to be 15,000,000 individuals.
Black-chinned hummingbird	Archilochus alexandri	8,800,000
Anna's hummingbird	Calypte anna	9,600,000
Broad-tailed hummingbird	Selasphorus platycercus	9,800,000
Rufous hummingbird	Selasphorus rufus	22,000,000
Ruby-throated hummingbird	Archilochus colubris	36,000,000
Grey-rumped swift	Chaetura cinereiventris	50,000,000
Common swift	Apus apus	80,000,000-142,000,000			Preliminary estimate extrapolated from European data, which represents 40% of population.	175px

Species without population estimates

Common name	Binomial name	Population	Status	Trend	Notes	Image
Venezuelan sylph	Aglaiocercus berlepschi	unknown
Green violetear	Colibri thalassinus	unknown			IOC taxonomy splits an additional species, the lesser violetear from this species. IUCN/BirdLife International maintain both species within C. thalassinus.	175px
Rothschild's swift	Cypseloides rothschildi	unknown
Neblina metaltail	Metallura odomae	unknown			Species was previously reported to have ~6,700 mature individuals. In the interim, this preliminary estimate has been rescinded.