List of Pelecaniformes by population

This is a list of Pelecaniformes 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 not comprehensive, as not all Pelecaniformes have had their numbers quantified.

Species by global population

Common name	Binomial name	Population	Status	Trend	Notes	Image
Dwarf ibis	Bostrychia bocagei	190-2,500[1]	CR[1]	[1]	Estimate calculated from density and area estimates. Equal to 130-1,700 mature individuals.[1]
Northern bald ibis	Geronticus eremita	200-249[2]	EN[2]	[2]	Estimate for mature individuals only. Species is considered regionally extinct in Europe.[2]
Giant ibis	Thaumatibis gigantea	290[3]	CR[3]	[3]	Minimum estimate. Equal to 194 mature individuals.[3]
White-eared night-heron	Oroanassa magnifica	350-1,500[4]	EN[4]	[4]	Equal to 250-999 mature individuals.[4]
Rough-faced shag	Phalacrocorax carunculatus	350 – 1500[5]	VU[5]	[5]
Asian crested ibis	Nipponia nippon	550[6]	EN[6]	[6]	Equal to 330 mature individuals.[6]
Bounty shag	Phalacrocorax ranfurlyi	620[7]	VU[7]	[7]	Minimum estimate.[7]
White-shouldered ibis	Pseudibis davisoni	1,000[8]	CR[8]	[8]	Minimum estimate. Equal to 670 mature individuals.[8]
Fasciated tiger-heron	Tigrisoma fasciatum	1,000-10,000[9]	LC[9]	Unknown[9]	Equal to 670-6,700 mature individuals.[9]
Schrenck's bittern	Ixobrychus eurhythmus	1,000-25,000[10]	LC[10]	[10]	Equal to 670-17,000 mature individuals.[10]
Wattled ibis	Bostrychia carunculata	1,000-25,000[11]	LC[11]	Unknown[11]	Equal to 670-17,000 mature individuals.[11]
Chatham shag	Phalacrocorax onslowi	1070[12]	CR[12]	[12]
Pitt shag	Phalacrocorax featherstoni	1400[13]	EN[13]	[13]
Australasian bittern	Botaurus poiciloptilus	1,500-4,000[14]	VU[14]	[14]	Equal to 1,000-2,499 mature individuals.[14]
Flightless cormorant	Phalacrocorax harrisi	1679[15]	VU[15]	[15]
Malayan night-heron	Gorsachius melanolophus	2,000-20,000[16]	LC[16]	Unknown[16]	Equal to 1,300-13,000 mature individuals. Subpopulations include 100-10,000 breeding pairs in Taiwan, and 100-10,000 in Japan.[16]
Forest bittern	Zonerodius heliosylus	2,500-9,999[17]	NT[17]	[17]	Equal to 1,500-7,000 mature individuals.[17]
Madagascar sacred ibis	Threskiornis bernieri	2,600-3,250[18]	EN[18]	[18]	Equal to 1,733-2,166 mature individuals.[18]
Olive ibis	Bostrychia olivacea	3,000-45,000[19]	LC[19]	[19]	Estimate is for mature individuals only.[19]
Christmas frigatebird	Fregata andrewsi	3600 – 7200[20]	VU[20]	[20]
Black-faced spoonbill	Platalea minor	3,941[21]	EN[21]	[21]	Equal to approximately 2,250 mature individuals.[21]
Auckland shag	Phalacrocorax colensoi	4500[22]	VU[22]	[22]
Bronze shag	Phalacrocorax chalconotus	5000 – 8000[23]	VU[23]	[23]	Numbers may be overestimated.[23]
Shoebill	Balaeniceps rex	5000 – 8000[24]	VU[24]	[24]
Red-billed tropicbird	Phaethon aethereus	5000 – 20 000[25]	LC[25]	[25]
Southern bald ibis	Geronticus calvus	6,500-8,000[26]	VU[26]	[26]	Equal to 3,300-4,000 mature individuals and 1,650-2,000 breeding pairs.[26]
African spoonbill	Platalea alba	7,300-73,000[27]	LC[27]	[27]	Estimate is for mature individuals only.[27]
Japanese night-heron	Gorsachius goisagi	7,500-15,000[28]	VU[28]	[28]	Equal to 5,000-9,999 mature individuals.[28]
Campbell shag	Phalacrocorax campbelli	8000[29]	VU[29]	[29]	Estimate may be dated.[29]
Bank cormorant	Phalacrocorax neglectus	8400[30]	EN[30]	[30]
Crowned cormorant	Phalacrocorax coronatus	8700[31]	NT[31]	[31]
Abbott's booby	Papasula abbotti	9000[32]	EN[32]	[32]
Madagascar crested ibis	Lophotibis cristata	10,000[33]	NT[33]	[33]	Equal to 6,700 mature individuals.[33]
Puna ibis	Plegadis ridgwayi	10,000-15,000[34]	LC[34]	[34]	Equal to 6,700-10,000 mature individuals.[34]
Sharp-tailed ibis	Cercibis oxycerca	10,000-25,000[35]	LC[35]	[35]	Equal to 6,700-17,000 mature individuals.[35]
Dalmatian pelican	Pelecanus crispus	10 000 – 13 900[36]	VU[36]	[36]
Spot-billed pelican	Pelecanus philippensis	13 000 – 18 000[37]	NT[37]	[37]
Black-headed ibis	Threskiornis melanocephalus	15,000-30,000[38]	NT[38]	[38]	Equal to 10,000-19,999 mature individuals. Subpopulation estimates include 10,000 in south Asia, 10,000 in south-east Asia, and 100 in east Asia.[38]
White-backed night-heron	Calherodius leuconotus	25,000-100,000[39]	LC[39]	[39]
White-crested tiger-heron	Tigrionrnis leucolopha	25,000-100,000[40]	LC[40]	[40]
Black-faced ibis	Theristicus melanopis	25,000-100,000[41]	LC[41]	[41]
Ascension frigatebird	Fregata aquila	25 000 – 32 000[42]	VU[42]	Unknown[42]
Japanese cormorant	Phalacrocorax capillatus	25 000 – 100 000[43]	LC[43]	Unknown[43]
Rufescent tiger-heron	Tigrisoma lineatum	27,700-105,500[44]	LC[44]	[44]	Equal to 18,000-70,000 mature individuals.[44]
Red-legged cormorant	Phalacrocorax gaimardi	30 000[45]	NT[45]	[45]
Nazca booby	Sula granti	30 000[46]	LC[46]	[46]	Minimum estimate.[46]
Red-tailed tropicbird	Phaethon rubricauda	32 000[47]	LC[47]	[47]	Minimum estimate.[47]
Oriental darter	Anhinga melanogaster	33 000[48]	NT[48]	[48]	Minimum estimate.[48]
White-tailed tropicbird	Phaethon lepturus	50 000[49]	LC[49]	[49]	Minimum estimate.[49]
Pinnated bittern	Botaurus pinnatus	50,000-499,999[50]	LC[50]	[50]	Estimate is for mature individuals only.[50]
Agami heron	Agamia agami	50,000-499,999[51]	VU[51]	Unknown[51]	Calculation may need to be revised. Actual global population may be smaller.[51]
Bare-throated tiger-heron	Tigrisoma mexicanum	50,000-499,999[52]	LC[52]	[52]
Green ibis	Mesembrinibis cayennensis	50,000-499,999[53]	LC[53]	[53]	Estimate is for mature individuals only.[53]
Eurasian spoonbill	Platelea leucorodia	63,000-65,000[54]	LC[54]	Unknown[54]	European subpopulation includes 20,400-30,500 mature individuals.[54]
Black bittern	Ixobrychus flavicollis	63,000-320,000[55]	LC[55]	[55]	Subpopulation at China is 100-100,000 breeding pairs.[55]
Pygmy cormorant	Phalacrocorax pygmeus	85 000 – 180 000[56]	LC[56]	[56]
Yellow bittern	Ixobrychus sinensis	100,000-1,000,000[57]	LC[57]	Unknown[57]
Straw-necked ibis	Threskiornis spinicollis	100,000-1,000,000[58]	LC[58]	[58]
Peruvian pelican	Pelecanus thagus	100 000 – 1 000 000[59]	NT[59]	[59]
Socotra cormorant	Phalacrocorax nigrogularis	110 000[60]	VU[60]	[60]
Eurasian bittern	Botaurus stellaris	115,000-340,000[61]	LC[61]	[61]	European subpopulation includes 75,300-133,000 mature individuals.[61]
Cinnamon bittern	Ixobrychus cinnamomeus	130,000-2,000,000[62]	LC[62]	[62]
American white pelican	Pelecanus erythrorhynchos	180 000[63]	LC[63]	[63]
Brown booby	Sula leucogaster	200 000[64]	LC[64]	[64]	Minimum estimate.[64]
African sacred ibis	Threskiornis aethiopicus	200,000-450,000[65]	LC[65]	[65]	Estimate is for mature individuals only.[65]
Spot-breasted ibis	Bostrychia rara	200,000-510,000[66]	LC[66]	[66]
Glossy ibis	Plegadis falcinellus	200,000-2,300,000[67]	LC[67]	[67]	This estimate involves the European subpopulation of 56,500-75,400 mature individuals.[67]
White ibis	Eudocimus albus	210,000-360,000[68]	LC[68]	[68]	Estimate is for mature individuals only.[68]
Striated heron	Butorides striata	260,000-2,300,000[69]	LC[69]	[69]	Equal to 173,000-1,500,000 mature individuals. Will likely need to be revised under recent taxonomic changes.[69]
Red-faced cormorant	Phalacrocorax urile	200 000[70]	LC[70]	[70]	Minimum estimate.[70]
Cape cormorant	Phalacrocorax capensis	200 000 – 250 000[71]	NT[71]	[71]
Cape gannet	Morus capensis	300 000[72]	VU[72]	[72]	Mature population only (~150 000 pairs).[72]
Squacco heron	Ardeola rallodies	370,000-780,000[73]	LC[73]	[73]	European subpopulation estimated at 30,000-51,700 mature individuals.[73]
Boat-billed heron	Cochlearius cochlearius	500,000-4,999,999[74]	LC[74]	[74]
Black-crowned night-heron	Nycticorax nycticorax	570,000-3,730,000[75]	LC[75]	[75]	Subpopulations include 120,000-172,000 mature individuals in Europe.[75]
Common little bittern	Ixobrychus minutus	630,000-1,110,000[76]	LC[76]	[76]	Estimate is for mature individuals only. Further validation is needed.[76]
Northern gannet	Morus bassanus	950 000 – 1 200 000[77]	LC[77]	[77]
Red-footed booby	Sula sula	1 000 000[78]	LC[78]	[78]	Minimum estimate.[78]
White-faced ibis	Plegadis chihi	1,200,000[79]	LC[79]	[79]
Great cormorant	Phalacrocorax carbo	1 400 000 – 2 900 000[80]	LC[80]	[80]
Neotropic cormorant	Phalacrocorax brasilianus	2 000 000[81]	LC[81]	[81]
Guanay cormorant	Phalacrocorax bougainvillii	2 500 000 – 4 999 999[82]	NT[82]	[82]

See also

• Biology portal
• Birds portal

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