List of Anseriformes by population

This is a list of Anseriformes species by global population. Where possible, estimates are given for both the population of mature individuals, and the total global population. This list follows IUCN classifications for species names and taxonomy. Where IUCN classifications differ from other ornithological authorities, alternative names and species classifications are noted.

Anseriformes (Anser being Latin for "goose") is the taxonomic order to which the ducks, geese, swans, and screamers belong. Version 15.1 (2025) of the IOC World Bird List describes 178 species belonging to Anseriformes, three of which are extinct.^[1] BirdLife International has assessed 166 species; 89 (54% of total species) have had their population estimated.^{[needs update]} A variety of methods are used for counting waterfowl. For example, in North America, national and sub-national agencies use planes and helicopters to make aerial transects of breeding populations, and extrapolate these counts over the species' known ranges. Methodologies are continuously being refined; thus estimates can be expected to become more accurate over time. Forecasts can be made by studying habitat condition trends and by interviewing local experts.^[2] For more information on how these estimates were ascertained, see Wikipedia's articles on population biology and population ecology.

The first two birds in this list, the pink-headed duck and crested shelduck, retain a status of Critically Endangered on the IUCN Red List but may be extinct. The last sighting of the former occurred in 1948-1949, but some dispute this date and argue the species was last reliably documented in the 1930s, 1923, or 1910.^[3][4] The last pink-headed ducks in captivity died in the 1940s.^[3] Unconfirmed reports from Myanmar provide some hope this species is still extant.^[3]

The last confirmed reporting of the crested shelduck was in 1964 near Vladivostok. A disputed record from North Korea was claimed in March 1971. Unconfirmed reports from Northeast China are the best chance this species is still extant.^[5] To be assessed as Critically Endangered, a species must have experienced a decline of at least 80% in the past ten years or three generations, or be projected to decline that much in the future ten years or three generations.^[6] Some species included in this list are rapidly approaching their minimum viable population (MVP)^{[citation needed]}, at which point the species would become functionally extinct.

Extinct species

• Réunion shelduck or Réunion sheldgoose; Alopochen kervazoi: known only from fossils; extinct by 1710.^[7]
• Mauritius shelduck or Mauritius sheldgoose; Alopochen mauritania: described by Johannes Pretorius (as sheldgoose) in 1669; extinct by 1698.^[8][9]
• Amsterdam duck or Amsterdam wigeon; Mareca marecula: known from fossils, extinct by 1793 due to hunting and introduced rats.^[10][11]
• Mauritius duck or Mascarene teal; Anas theodori: early explorers described "a great number of grey teal" on Mauritius in 1681, which may have referred to this bird.^[12] Last reported in 1696.^[13]
• Mariana mallard; Anas oustaleti: considered by some taxonomists to be a subspecies of the mallard or American black duck. Last known individual died in captivity in 1981.^[14]
• Finsch's duck; Chenonetta finschi: once very abundant, went extinct between 1250-1860.^[15][16]
• Labrador duck; Camptorhynchus labradorius: hunted to extinction; last seen in 1875.^[17]
• New Zealand merganser or Auckland Island merganser; Mergus australis: hunted to extinction; last recorded in 1902.^[18]

Species by global population

Common name	Binomial name	Population	Status	Trend	Notes	Image
Pink-headed duck	Rhodonessa caryophyllacea	0-49[3]	CR[3]	?[3]	May be extinct. No documented sightings have occurred since the early 20th century.[3]
Crested shelduck	Tadorna cristata	1-49[19]	CR[19]	?[19]	May be extinct. Last reliable sighting occurred in 1964.[20]
Madagascar pochard	Aythya innotata	30-50[21]	CR[21]	[21]	Rediscovered in 2006. Best estimate of current mature individuals is 45.[21]
Brazilian merganser	Mergus octosetaceus	50-249[22]	CR[22]	[22]	This is a precautionary estimate. Actual population may exceed this estimate.[22]
White-winged duck	Asarcornis scutulata	150-450[23]	CR[23]	[23]
Baer's pochard	Aythya baeri	150-700[24]	CR[24]	[24]
Laysan duck	Anas laysanensis	500-680[25]	CR[25]	[25]	The U.S. Fish & Wildlife Service estimated in 2022 that total population contains 1413 individuals between populations on Laysan, Midway, and Kure.[26]
Campbell teal	Anas nesiotis	> c. 500[27]	VU[27]	[27]	No formal count has been conducted. This is an opportunistic estimate.[27]
Madagascar teal (Bernier's teal)	Anas bernieri	630-1,900[28]	EN[28]	[28]	Total population is not given. This estimate for mature individuals is based on multiple counts.[28]
Hawaiian duck	Anas wyvilliana	700-999[29]	VU[29]	[29]	Total population estimated at 751-1,185 individuals.[29]
Auckland teal	Anas aucklandica	330-1,700 1,000-1,700[30]	NT[30]	[30]	First given estimate is obtained from considering multiple counts over the years. The second is purely the 2021 estimate.[30]
Andaman teal	Anas albogularis	1,000-2,500[31]	NT[31]	[31]	Estimate is for mature individuals only; numbers may be higher.[31]
Meller's duck	Anas melleri	1,300-3,300[32]	EN[32]	[32]	Total population estimated at 2,000-5,000 individuals.[32]
Blue duck	Hymenolaimus malacorhynchos	1,500-2,499[33]	EN[33]	[33]
Brown teal	Anas chlorotis	1,600-2,200[34]	NT[34]	[34]	Total population estimated at 2,400-3,400 individuals.[34]
Hawaiian goose (Nēnē)	Branta sandvicensis	1,700-2,200[35]	NT[35]	[35]
Scaly-sided merganser	Mergus squamatus	2,000-3,500[36]	EN[36]	[36]
Spectacled duck (Bronze-winged teal)	Speculanas specularis	2,500-9,999[37]	NT[37]	[37]	Population size has not been directly estimated. Number of mature individuals likely toward lower end of estimate.[37]
Blue-winged goose	Cyanochen cyanoptera	3,000-7,000[38]	NT[38]	[38]
White-headed steamerduck (Chubut steamer duck)	Tachyeres leucocephalus	3,400-3,700[39]	VU[39]	[39]	Total population estimated at 5,300-5,600 individuals from a count in 2011.[39]
Maccoa duck	Oxyura maccoa	4,800-5,700[40]	EN[40]	[40]	Estimate from observations in East and South Africa.[40]
White-headed duck	Oxyura leucocephala	5,300-8,700[41]	EN[41]	[41]	Total population estimated at 7,900-20,000 individuals based on separate metrics. A large portion of the population (central Asia) is likely not recorded.[41]
West Indian whistling-duck	Dendrocygna arborea	6,000-15,000[42]	NT[42]	[42]	Total population conservatively estimated at 10,000-19,999 individuals.[42]
Spotted whistling-duck	Dendrocygna guttata	6,700-17,000[43]	LC[43]	[43]	Total population estimated at 10,000-25,000 individuals.[43]
Magellanic steamerduck (Flightless steamer duck; Fuegian steamer duck)	Tachyeres pteneres	6,700-67,000[44]	LC[44]	[44]	There is little to no evidence of any declines in population, so assumed to be stable. There is no total population estimate.[44]
Coscoroba swan	Coscoroba coscoroba	7,000-19,999[45]	LC[45]	[45]	Total population estimated at 10,000-25,000 individuals.[45]
Freckled duck	Stictonetta naevosa	7,300-17,000[46]	LC[46]	[46]	Total population estimated at 11,000-26,000 individuals.[46]
Flying steamerduck	Tachyeres patachonicus	7,300-18,000[47]	LC[47]	[47]	Global population is estimated at 11,000-26,000 individuals. Falkland Islands population is estimated at 600–1,200 total birds.[47]
White-backed duck	Thalassornis leuconotus	8,500-20,000[48]	LC[48]	[48]	Total population estimated at 13,000-30,000 individuals.[48]
Salvadori's teal	Salvadorina waigiuensis	>10,000[49]	LC[49]	?[49]	Population size has not been quantified. Estimate given is based on extremely rough estimates for LC classification.[49]
Marbled duck	Marmaronetta angustirostris	10,000-42,000[50]	NT[50]	[50]	Total population is estimated at 15,000-61,250 individuals. Species counts come from four discrete flyways, some of which are outdated.[50]
Sunda teal	Anas gibberifrons	10,000-100,000[51]	LC[51]	?[51]	Total population is unknown.[51]
Cape Barren goose	Cereopsis novaehollandiae	11,000-12,000[52]	LC[52]	[52]	Total population estimated at 16,000-18,000 individuals.[52]
Blue-billed duck	Oxyura australis	11,000-19,000[53]	LC[53]	[53]	Best estimate for number of mature individuals is 15,000.[53]
Torrent duck	Merganetta armata	13,300-23,500[54]	LC[54]	[54]	Total population estimated to be 20,000-35,200 individuals.[54]
Cape shoveler	Spatula smithii	13,300-33,300[55]	LC[55]	[55]	Total population estimated to be 20,000-50,000 individuals.[55]
Philippine duck	Anas luzonica	15,000-30,000[56]	LC[56]	[56]	Total population is estimated to fall between 20,000 and 40,000 from post-2020 censuses.[56]
Orinoco goose	Neochen jubata	15,000-40,000[57]	LC[57]	[57]
Lesser white-fronted goose	Anser erythropus	16,000-27,000[58]	VU[58]	[58]	Global population estimated to be 24,000-40,000 individuals.[58] Current European breeding population estimated ~420 birds.[59]
Masked duck	Nomonyx dominicus	16,000-200,000[60]	LC[60]	[60]	These are extreme estimates due to uncertainty on population.[60]
Comb duck	Sarkidiornis sylvicola	16,700-66,700[61]	LC[61]	[61]	Total population estimated to be 25,000-100,000 individuals.[61]
Horned screamer	Anhima cornuta	16,700-66,700[62]	LC[62]	[62]	Total population estimated to be 25,000-100,000 individuals.[62]
Hartlaub's duck	Pteronetta hartlaubii	16,700-73,300[63]	LC[63]	[63]	Total population estimated to be 25,001-110,000 individuals.[63]
Red-breasted goose	Branta ruficollis	19,000-48,000[64]	VU[64]	[64]	Best estimate for breeding population is 33,000. Total population estimated to be 28,100-72,600.[64][65]
Andean teal	Anas andium	20,000-30,000[66]	LC[66]	[66]	Total population estimated to be <40,000 individuals.[66]
Musk duck	Biziura lobata	20,000-49,999[67]	LC[67]	[67]	Total population estimated to be 10,000-60,000 individuals.[67]
Southern pochard	Netta erythrophthalma	20,000-65,000[68]	LC[68]	[68]	Total population estimated to be 30,002-97,500 individuals.[68]
New Zealand scaup	Aythya novaeseelandiae	20,000-100,000[69]	LC[69]	[69]
Andean duck	Oxyura ferruginea	23,300-73,300[70]	LC[70]	[70]	Total population is estimated to be 35,000-110,000 individuals.[70]
Lake duck	Oxyura vittata	25,000-100,000[71]	LC[71]	[71]	Values given are total estimated population size.[71]
Ringed teal	Callonetta leucophrys	25,000-100,000[72]	LC[72]	[72]	Values given are total estimated population size.[72]
Crested duck	Lophonetta specularioides	27,300-107,000[73]	LC[73]	[73]	Total population is estimated to be 41,000-161,000 individuals.[73]
Ruddy-headed goose	Chloephaga rubidiceps	28,500-54,700[74]	LC[74]	[74]	Total population is estimated to be 42,744-82,000 individuals.[74]
Southern pintail (Eaton's pintail)	Anas eatoni	30,000-40,000[75]	LC[75]	[75]	Total population is estimated at 45,000-60,000 in Kergeulen Islands; additional 1,800-2,100 in Crozet Islands.[75]
Green pygmy-goose	Nettapus pulchellus	33,300-133,000[76]	LC[76]	?[76]	Total population is estimated to be 50,000-200,000 individuals.[76]
Silver teal	Spatula versicolor	34,900-136,000[77]	LC[77]	[77]	Total population is estimated to be 52,400-204,500 individuals.[77]
Swan goose	Anser cygnoides	36,000-43,500[78]	EN[78]	[78]	Total population is estimated to be 54,400 individuals.[78]
Blue-billed teal	Spatula hottentota	36,700-141,000[79]	LC[79]	[79]	Total population is estimated to be 55,100-211,000 individuals.[79]
African pygmy-goose	Nettapus auritus	38,300-213,000[80]	LC[80]	[80]	Total population is estimated to be 57,500-320,000 individuals.[80]
Trumpeter swan	Cygnus buccinator	50,000[81]	LC[81]	[81]	Total population is estimated at 76,000 individuals.[81]
Muscovy duck	Cairina moschata	50,000-499,999[82]	LC[82]	[82]	Values given are total estimated population size.[82]
Smew	Mergellus albellus	58,700-144,000[83]	LC[83]	?[83]	Total population is estimated to be 88,000-216,000 individuals.[83]
Northern screamer	Chauna chavaria	60,000-130,000[84]	LC[84]	[84]	Total population estimated at 100,000-200,000 individuals.[84]
Knob-billed duck	Sarkidiornis melanotos	60,000-227,000[85]	LC[85]	[85]	Total population is estimated at 90,000-340,000 individuals.[85]
Mandarin duck	Aix galericulata	65,000-66,000[86]	LC[86]	[86]	Values given are total estimated population size. Estimate is collated from four national populations.[86]
Southern screamer	Chauna torquata	66,700-667,000[87]	LC[87]	[87]	Total population estimated to be 100,000-1,000,000 individuals.[87]
Puna teal	Spatula puna	66,700-667,000[88]	LC[88]	[88]	Total population estimated to be 100,000-1,000,000 individuals.[88]
Plumed whistling-duck	Dendrocygna eytoni	66,700-667,000[89]	LC[89]	[89]	Total population estimated to be 100,000-1,000,000 individuals.[89]
Hardhead	Aythya australis	66,700-667,000[90]	LC[90]	[90]	Total population estimated to be 100,001-1,001,000 individuals.[90]
Yellow-billed pintail	Anas georgica	67,900-675,000[91]	LC[91]	[91]	Total population is estimated to be 101,801-1,013,000 individuals.[91]
Chestnut teal	Anas castanea	70,000[92]	LC[92]	?[92]	Total population is estimated to be 105,000 individuals.[92]
Indian spot-billed duck	Anas poecilorhyncha	73,300-133,000[93]	LC[93]	?[93]	Total population is estimated to be 110,000-200,000 individuals.[93]
Cotton pygmy-goose	Nettapus coromandelianus	83,300-741,000[94]	LC[94]	?[94]	Total population is estimated to be 125,002-1,111,000 individuals.[94]
Falcated duck	Mareca falcata	87,000-100,000[95]	LC[95]	[95]	Total population is estimated to be 132,500-150,000 individuals.[95]
Emperor goose	Anser canagicus	90,000-120,000[96]	LC[96]	[96]	Total population is estimated to be 158,000 individuals.[96]
Whooper swan	Cygnus cygnus	100,000-499,999[97]	LC[97]	[97]	Best estimate for number of mature individuals is 176,000. Total population is estimated to be 264,600 individuals.[97]
Pink-footed goose	Anser brachyrhynchus	100,000-499,999[98]	LC[98]	[98]	Best estimate for number of mature individuals is 387,000. Total population is estimated to be 580,000 individuals.[98]
Black swan	Cygnus atratus	100,000-1,000,000[99]	LC[99]	[99]	Values given are total estimated population size.[99]
Pacific black duck	Anas superciliosa	120,000-783,000[100]	LC[100]	[100]	Total population is estimated to be 180,001-1,175,000 individuals.[100]
Steller's eider	Polysticta stelleri	130,000-150,000[101]	VU[101]	[101]	Values given are total estimated population size.[101]
Lesser whistling-duck	Dendrocygna javanica	133,000-1,330,000[102]	LC[102]	[102]	Total population is estimated to be 200,000-2,000,000 individuals.[102]
Ruddy shelduck	Tadorna ferruginea	134,000-198,000[103]	LC[103]	[103]	Total population is estimated to be 201,030-297,080 individuals.[103]
Velvet scoter	Melanitta fusca	141,000-268,000[104]	VU[104]	[104]	Total population is estimated to be 210,000-400,000 individuals.[104]
Grey teal	Anas gracilis	147,000-747,000[105]	LC[105]	[105]	Total population estimated to be 220,000-1,120,001 individuals.[105]
Barrow's goldeneye	Bucephala islandica	175,000-200,000[106]	LC[106]	[106]	Total population is estimated to be 260,000-300,000 individuals, though this is a rough estimate due to counting methods for populations in Alaska.[106] European population (1600-1800 mature individuals) is Near Threatened.[107]
Ferruginous duck	Aythya nyroca	180,000-240,000[108]	NT[108]	[108]	Values given are total estimated population size.[108]
Harlequin duck	Histrionicus histrionicus	190,000-380,000[109]	LC[109]	[109]	Values given are total estimated population size.[109]
Spur-winged Goose	Plectropterus gambensis	200,000-333,000[110]	LC[110]	[110]	Total population is estimated to be 300,000-500,000 individuals.[110]
Black-bellied whistling-duck	Dendrocygna autumnalis	200,000-2,000,000[111]	LC[111]	[111]	IUCN does not provide a total population estimate.[111] Partners in Flight estimates breeding population at 1,000,000 individuals.[112]
Tundra swan	Cygnus columbianus	221,000-234,000[113]	LC[113]	[113]	Total population is estimated to be 332,000-352,000 individuals.[113]European population classified as Vulnerable.[114]
Spectacled eider	Somateria fischeri	250,000[115]	NT[115]	[115]	Total population is estimated to be 360,000-400,000 individuals.[115]
Surf scoter	Melanitta perspicillata	250,000-1,300,000[116]	LC[116]	[116]	Values given are total estimated population size.[116]
Red-crested pochard	Netta rufina	300,000-440,000[117]	LC[117]	[117]	Total population is estimated to be 450,000-660,000.[117]
Mute swan	Cygnus olor	308,000-348,000[118]	LC[118]	[118]	Total population (including introduced range) is estimated to be 461,300-522,400 individuals.[118]
Baikal teal	Sibirionetta formosa	333,000-467,000[119]	LC[119]	[119]	Total population is estimated to be 500,000-700,000 individuals.[119]
Black scoter	Melanitta americana	350,000-560,000[120]	NT[120]	[120]	Total population is estimated to be 350,000-560,000 individuals.[120]
Cinnamon teal	Spatula cyanoptera	380,000[121]	LC[121]	[121]	IUCN does not provide a total population estimate.[121]
White-winged scoter	Melanitta deglandi	400,000[112]	LC[122]	[122]	IUCN does not provide population estimates for this bird.[122] Values given come from Partners in Flight estimate.
Siberian scoter (Stejneger's scoter)	Melanitta stenjnegeri	400,000-700,000[123]	LC[123]	[123]	Total population is estimated to be 600,000-1,000,000 individuals.[123]
Common shelduck	Tadorna tadorna	415,000-500,000[124]	LC[124]	[124]	Total population is estimated to be 625,000-750,000 individuals.[124]
Brent goose (Brant)	Branta bernicla	490,000[125]	LC[125]	?[125]	IUCN does not provide a total population estimate. European population is 3,000-3,600 mature individuals.[125]
Red-breasted merganser	Mergus serrator	495,000-605,000[126]	LC[126]	[126]	Values given are total estimated population size.[126] European breeding populations are classified as Near Threatened.[127]
Magpie goose	Anseranas semipalmata	667,000[128]	LC[128]	[128]	Total population estimated to be 1,000,000 individuals.[128]
Rosy-billed pochard	Netta peposaca	667,000[129]	LC[129]	[129]	Total population estimated to be 1,000,000 individuals.[129]
Bean goose	Anser fabalis	680,000-800,000[130]	LC[130]	[130]	Values given are estimated total population size.[130] Note that the IOU split this species into the separate Taiga bean goose and Tundra bean goose.[1] This split has not been recognized by the IUCN.
Canvasback	Aythya valisineria	690,000[131]	LC[131]	[131]	No total population estimate given.[131]
American black duck	Anas rubripes	700,000[132]	LC[132]	[132]	No total population estimate given.[132]
Common pochard	Aythya ferina	760,000-790,000[133]	VU[133]	[133]	Total population estimated to be 1.14-1.18 million individuals.[133]
King eider	Somateria spectabilis	800,000-900,000[134]	LC[134]	[134]	Values given are estimated total population size.[134]
Eastern spot-billed duck	Anas zonorhyncha	800,000-1,600,000[135]	LC[135]	[135]	Values given are estimated total population size.[135]
Fulvous whistling-duck	Dendrocygna bicolor	820,000-980,000[136]	LC[136]	[136]	Total population estimated to be 1.23-1.47 million individuals.[136]
Barnacle goose	Branta leucopsis	880,000[137]	LC[137]	[137]	Values given are estimated total population size.[137]
Greylag goose	Anser anser	1,000,000-1,100,000[138]	LC[138]	[138]	Values given are estimated total population size.[138]
Garganey	Spatula querquedula	1,030,000-1,700,000[139]	LC[139]	[139]	Total population estimated to be 1.55-2.55 million individuals.[139]
Common scoter	Melanitta nigra	1,070,000[140]	LC[140]	?[140]	Total population estimated to be 1.6 million individuals.[140]
Hooded merganser	Lophodytes cucullatus	1,100,000[141]	LC[141]	[141]	Values given are estimated total poplation size.[141]
Redhead	Aythya americana	1,200,000[142]	LC[142]	[142]	No total population estimate given.[142]
Bufflehead	Bucephala albeola	1,300,000[143]	LC[143]	[143]	No total population estimate given.[143]
Tufted duck	Aythya fuligula	1,330,000-1,730,000[144]	LC[144]	[144]	Total population estimated to be 2.0-2.6 million individuals.[144]
White-faced whistling-duck	Dendrocygna viduata	1,410,000-1,700,000[145]	LC[145]	[145]	Total population estimated to be 2.12-2.55 million individuals.[145]
Common eider	Somateria mollissima	1,580,000-1,910,000[146]	NT[146]	?[146]	Total population estimated to be 3.3-4.0 million individuals.[146]
Goosander (Common merganser)	Mergus merganser	1,700,000-2,400,000[147]	LC[147]	?[147]	Values given are estimated total population size.[147]
Eurasian wigeon	Mareca penelope	1,770,000-2,390,000[148]	LC[148]	[148]	Total population estimated to be 2.65-3.59 million individuals.[148]
Ring-necked duck	Aythya collaris	2,000,000[149]	LC[149]	[149]	No total population estimate given.[149]
Ross's goose	Anser rossii	2,100,000[150]	LC[150]	[150]	No total population estimate given.[150]
American wigeon	Mareca americana	2,700,000[151]	LC[151]	[151]	No total population estimate given.[151]
Common goldeneye	Bucephala clangula	2,700,000-4,700,000[152]	LC[152]	[152]	Values given are estimated total population size.[152]
Common teal	Anas crecca	2,800,000[153]	LC[153]	?[153]	No total population estimate given.[153]
Long-tailed duck	Clangula hyemalis	3,200-000-3,750,000[154]	VU[154]	[154]	Values given are estimated total population size.[154]
Lesser scaup	Aythya affinis	3,700,000[155]	LC[155]	[155]	No total population estimate given.[155]
Green-winged teal	Anas carolinensis	3,900,000[156]	LC[156]	[156]	No total population estimate given.[156]
Gadwall	Mareca strepera	4,050,000-4,860,000[157]	LC[157]	[157]	No total population estimate given.[157]
Northern shoveler	Anas clypeata	4,300,000-4,700,000[158]	LC[158]	[158]	Total population estimated to be 6.5-7.0 million individuals.[158]
Cackling goose	Branta hutchinsii	4,500,000[159]	LC[159]	[159]	No total population estimate given.[159]
Wood duck	Aix sponsa	4,600,000[160]	LC[160]	[160]	No total population estimate given.[160]
Northern pintail	Anas acuta	4,700,000-4,800,000[161]	LC[161]	[161]	Total population estimated to be 7.1-7.2 million individuals.[161]
Greater scaup	Aythya marila	4,920,000-5,130,000[162]	LC[162]	[162]	Values given are estimated total population size.[162]
Greater white-fronted goose	Anser albifrons	5,000,000-5,999,999[163]	LC[163]	?[163]	No total population estimate given.[163]
Canada goose	Branta canadensis	5,000,000-6,200,000[164]	LC[164]	[164]	Values given are estimated total population size.[164] Note that current data from Partners in Flight estimate 7.1 million mature individuals alone.[112]
Blue-winged teal	Spatula discors	7,800,000[165]	LC[165]	[165]	No total population estimate given.[165]
Snow goose	Anser caerulescens	15,000,000[166]	LC[166]	[166]	No total population estimate given.[166]
Mallard	Anas platyrhynchos	17,260,000-19,300,000[167]	LC[167]	[167]	Total population estimated to be 26.15-29.24 million individuals.[167]

See also

• Biology portal
• Birds portal

• Lists of birds by population
• Lists of organisms by population
• List of duck breeds