This is a list of Cuculiformes 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.

This list is incomprehensive, as not all Cuculiformes have had their numbers quantified.

The IOC World Bird List (version 15.1) recognizes 156 species of Cuculiformes, two of which are extinct.^[1] This list follows IUCN classifications for species names and taxonomy. Where IUCN classifications differ from other ornithological authorities, alternative names and taxonomies are noted.

Some species included as members of Cuculiformes are extinct:

• Snail-eating coua, or Delalande's coua (Coua delalandei) - last seen in 1834.^[2]

• St. Helena cuckoo (Nannococcyx psix) - last seen in 1550.^[3]

Common name	Binomial name	Population	Status	Trend	Notes	Image
Black-hooded coucal	Centropus steerii	150-600[4]	CR[4]	[4]
Cocos cuckoo	Coccyzus ferrugineus	250-999[5]	VU[5]	[5]	The total population is probably significantly below 1,000 individuals.[5]
Bay-breasted cuckoo	Coccyzus rufigularis	300-2,900[6]	EN[6]	[6]
Sumatran ground-cuckoo	Carpococcyx viridis	1,500-6,000[7]	EN[7]	[7]
Puerto Rican lizard-cuckoo	Coccyzus vieilloti	2,200-3,000[8]	LC[8]	[8]	Total population is estimated to be 3,300-4,600 individuals.[8]
Javan coucal (Sunda coucal)	Centropus nigrorufus	2,500-9,999[9]	VU[9]	[9]
Banded ground-cuckoo	Neomorphus radiolosus	2,500-12,000[10]	VU[10]	[10]
Green-billed coucal	Centropus chlororhynchus	5,000-15,000[11]	VU[11]	[11]
Red-faced malkoha	Phaenicophaeus pyrrhocephalus	5,600-23,000[12]	VU[12]	[12]
Moluccan cuckoo	Cacomantis aeruginosus	6,000-15,000[13]	LC[13]	[13]	Values likely an underestimate, given unsurveyed subpopulations on Obi, Buru, and Seram.[13]
Violaceous coucal	Centropus violaceus	6,700-61,000[14]	LC[14]	[14]
Biak coucal	Centropus chalybeus	>10,000[15]	NT[15]	[15]	No population estimates are available. Population "is not thought to be below 10,000 mature individuals."[15]
Short-toed coucal	Centropus rectunguis	>10,000[16]	VU[16]	[16]	The global population size has not been quantified. Population is "considered highly unlikely to meet or approach the population size threshold for listing as threatened (<10,000 mature individuals)."[16]
Lesser ground-cuckoo	Morococcyx erythropygus	50,000-499,999[17]	LC[17]	[17]
Pheasant cuckoo	Dromococcyx phasianellus	50,000-499,999[18]	LC[18]	[18]
Rufous-vented ground-cuckoo	Neomorphus geoffroyi	63,000-127,000[19]	VU[19]	[19]	Total population is estimated to be 95,000-191,000 individuals.[19] Note that IOC taxonomy splits an additional species, the scaled ground-cuckoo, from this species.[1] IUCN/BirdLife International maintain both within N. geoffroyi.[20]
Mangrove cuckoo	Coccyzus minor	200,000[21]	LC[21]	[21]
Lesser roadrunner	Geococcyx velox	500,000-4,999,999[22]	LC[22]	[22]
Little cuckoo	Coccycua minuta	500,000-4,999,999[23]	LC[23]	[23]
Striped cuckoo	Tapera naevia	500,000-4,999,999[24]	LC[24]	[24]
Greater ani	Crotophaga major	500,000-4,999,999[25]	LC[25]	[25]
Oriental cuckoo	Cuculus optatus	500,000-5,000,000[26]	LC[26]	[26]
Black-billed cuckoo	Coccyzus erythropthalmus	880,000[27]	LC[27]	[27]
Greater roadrunner	Geococcyx californianus	1,400,000[28]	LC[28]	[28]
Groove-billed ani	Crotophaga sulcirostris	2,000,000[29]	LC[29]	[29]
Great spotted cuckoo	Clamator glandarius	3,000,000-10,499,999[30]	LC[30]	[30]
Yellow-billed cuckoo	Coccyzus americanus	9,600,000[31]	LC[31]	[31]
Smooth-billed ani	Crotophaga ani	20,000,000[32]	LC[32]	[32]
Common cuckoo	Cuculus canorus	34,600,000-54,400,000[33]	LC[33]	[33]	Preliminary estimate.[33]

Common name	Binomial name	Population	Status	Trend	Notes	Image
Coral-billed ground-cuckoo	Carpococcyx renauldi	unknown[34]	EN[34]	[34]
Bornean ground-cuckoo	Carpococcyx radiceus	unknown[35]	VU[35]	[35]
Giant coua	Coua gigas	unknown[36]	VU[36]	[36]
Black-bellied malkoha	Phaenicophaeus diardi	unknown[37]	NT[37]	[37]
Chestnut-bellied malkoha	Phaenicophaeus sumatranus	unknown[38]	NT[38]	[38]
Andaman coucal	Centropus andamanensis	unknown[39]	LC[39]	[39]
Gabon coucal	Centropus anselli	unknown[40]	LC[40]
Pied coucal (White-necked coucal)	Centropus ateralbus	unknown[41]	LC[41]	[41]
Lesser coucal	Centropus bengalensis	unknown[42]	LC[42]	[42]	Several wide-ranging national estimates exist, but total population has not been quantified.[42]
Black-billed coucal (Lesser black coucal)	Centropus bernsteini	unknown[43]	LC[43]	[43]
Bay coucal	Centropus celebensis	unknown[44]	LC[44]	[44]
Coppery-tailed coucal	Centropus cupreicaudus	unknown[45]	LC[45]	[45]
Goliath coucal	Centropus goliath	unknown[46]	LC[46]	[46]
Black coucal	Centropus grillii	unknown[47]	LC[47]	[47]
Black-throated coucal	Centropus leucogaster	unknown[48]	LC[48]	[48]
Black-faced coucal	Centropus melanops	unknown[49]	LC[49]	[49]
Ivory-billed coucal (Greater black coucal)	Centropus menbeki	unknown[50]	LC[50]	[50]
Buff-headed coucal	Centropus milo	unknown[51]	LC[51]	[51]
Blue-headed coucal	Centropus monachus	unknown[52]	LC[52]	[52]
Pheasant coucal	Centropus phasianinus	unknown[53]	LC[53]	[53]
Senegal coucal	Centropus senegalensis	unknown[54]	LC[54]	[54]
Greater coucal	Centropus sinensis	unknown[55]	LC[55]	[55]	Two wide-ranging national estimates exist, but total population has not been quantified.[55]
Kai coucal	Centropus spilopterus	unknown[56]	LC[56]	[56]
White-browed coucal	Centropus superciliosus	unknown[57]	LC[57]	[57]	Note that IOC taxonomy splits an additional species, Burchell's coucal, from this species.[1] IUCN/BirdLife International maintain both within C. superciliosus.[20]
Malagasy coucal	Centropus toulou	unknown[58]	LC[58]	[58]
Rufous coucal	Centropus unirufus	unknown[59]	LC[59]	[59]
Philippine coucal	Centropus viridis	unknown[60]	LC[60]	[60]
Chattering yellowbill (Blue malkoha)	Ceuthmochares aereus	unknown[61]	LC[61]	[61]	Note that IOC taxonomy splits an additional species, the green malkoha, from this species.[1] IUCN/BirdLife International maintain both within C. aereus.[20]
Horsfield's bronze-cuckoo	Chalcites basalis	unknown[62]	LC[62]	[62]
Long-billed cuckoo	Chalcites megarhynchus	unknown[63]	LC[63]	[63]
Black-eared cuckoo	Chalcites osculans	unknown[64]	LC[64]	[64]
Diederik cuckoo	Chrysococcyx caprius	unknown[65]	LC[65]	[65]
African emerald cuckoo	Chrysococcyx cupreus	unknown[66]	LC[66]	[66]
Yellow-throated cuckoo	Chrysococcyx flavigularis	unknown[67]	LC[67]	[67]
Klaas's cuckoo	Chrysococcyx klaas	unknown[68]	LC[68]	[68]
Asian emerald cuckoo	Chrysococcyx maculatus	unknown[69]	LC[69]	[69]
Violet cuckoo	Chrysococcyx xanthorhynchus	unknown[70]	LC[70]	[70]
Chestnut-winged cuckoo	Clamator coromandus	unknown[71]	LC[71]	[71]	A wide-ranging national estimate exists for China, but total population has not been quantified.[71]
Jacobin cuckoo	Clamator jacobinus	unknown[72]	LC[72]	[72]
Levaillant's cuckoo	Clamator levaillantii	unknown[73]	LC[73]	[73]
Ash-colored cuckoo	Coccycua cinerea	unknown[74]	LC[74]	[74]
Dwarf cuckoo	Coccycua pumila	unknown[75]	LC[75]	[75]
Pearly-breasted cuckoo	Coccyzus euleri	unknown[76]	LC[76]	[76]
Grey-capped cuckoo	Coccyzus lansbergi	unknown[77]	LC[77]	[77]
Hispaniolan lizard-cuckoo	Coccyzus longirostris	unknown[78]	LC[78]	[78]
Dark-billed cuckoo	Coccyzus melacoryphus	unknown[79]	LC[79]	[79]
Cuban lizard-cuckoo (Great lizard cuckoo)	Coccyzus merlini	unknown[80]	LC[80]	[80]
Chestnut-bellied cuckoo	Coccyzus pluvialis	unknown[81]	LC[81]	[81]
Jamaican lizard-cuckoo	Coccyzus vetula	unknown[82]	LC[82]	[82]
Blue coua	Coua caerulea	unknown[83]	LC[83]	[83]
Coquerel's coua	Coua coquereli	unknown[84]	LC[84]	[84]
Crested coua	Coua cristata	unknown[85]	LC[85]	[85]
Running coua	Coua cursor	unknown[86]	LC[86]	[86]
Olive-capped coua	Coua olivaceiceps	unknown[87]	LC[87]	[87]
Red-fronted coua	Coua reynaudii	unknown[88]	LC[88]	[88]
Red-capped coua	Coua ruficeps	unknown[89]	LC[89]	[89]
Red-breasted coua	Coua serriana	unknown[90]	LC[90]	[90]
Verreaux's coua	Coua verreauxi	unknown[91]	LC[91]	[91]
Scale-feathered malkoha	Dasylophus cumingi	unknown[92]	LC[92]	[92]	IUCN/BirdLife International place species in genus Lepidogrammus.[92]
Red-crested malkoha (Rough-crested malkoha)	Dasylophus superciliosus	unknown[93]	LC[93]	[93]
Pavonine cuckoo	Dromococcyx pavoninus	unknown[94]	LC[94]	[94]
Eastern koel (Pacific koel)	Eudynamys orientalis	unknown[95]	LC[95]	[95]	Note that IOC taxonomy splits an additional species, the black-billed koel, from this species.[1] IUCN/BirdLife International maintain both within E. orientalis.[20]
Western koel (Asian koel)	Eudynamys scolopaceus	unknown[96]	LC[96]	[96]
Guira cuckoo	Guira guira	unknown[97]	LC[97]	[97]
Red-billed ground-cuckoo	Neomorphus pucheranii	unknown[98]	LC[98]	[98]
Rufous-winged ground-cuckoo	Neomorphus rufipennis	unknown[99]	LC[99]	[99]
Dwarf koel	Microdynamis parva	unknown[100]	LC[100]	[100]
Thick-billed cuckoo	Pachycoccyx audeberti	unknown[101]	LC[101]	[101]
Chestnut-breasted malkoha	Phaenicophaeus curvirostris	unknown[102]	LC[102]	[102]
Mentawai malkoha	Phaenicophaeus oeneicaudus	unknown[103]	LC[103]	[103]
Green-billed malkoha	Phaenicophaeus tristis	unknown[104]	LC[104]	[104]
Blue-faced malkoha	Phaenicophaeus viridirostris	unknown[105]	LC[105]	[105]
Common squirrel-cuckoo	Piaya cayana	unknown[106]	LC[106]	[106]	The global population has not been quantified due to recent taxonomic splits.[106] Note that IOC taxonomy maintains this species as a single species with P. mexicana.[1]
Mexican squirrel-cuckoo	Piaya mexicana	unknown[107]	LC[107]	[107]	The global population has not been quantified due to recent taxonomic splits.[107] Note that IOC taxonomy maintains this species as a single species with P. cayana.[1]
Black-bellied cuckoo	Piaya melanogaster	unknown[108]	LC[108]	[108]
Yellow-billed malkoha	Rhamphococcyx calyorhynchus	unknown[109]	LC[109]	[109]
Raffles's malkoha	Rhinortha chlorophaea	unknown[110]	LC[110]	[110]
Channel-billed cuckoo	Scythrops novaehollandiae	unknown[111]	LC[111]	[111]
Sirkeer malkoha	Taccocua leschenaultii	unknown[112]	LC[112]	[112]
Long-tailed koel	Urodynamis taitensis	unknown[113]	LC[113]	[113]
Red-billed malkoha	Zanclostomus javanicus	unknown[114]	LC[114]	[114]

• Lists of birds by population
• Lists of organisms by population