List of Anseriformes

Last updated

Anseriformes is an order of birds belonging to the clade Galloanseres. It consists of 3 families, 58 genera and 171 living species. [1] [2] Extinct species assignment follows the Mikko's Phylogeny Archive [3] and Paleofile.com websites. [4] This list is based on the taxonomy of the HBW and BirdLife International Illustrated Checklist of the Birds of the World by Josep del Hoyo and Nigel J. Collar also used by HBW, BirdLife International and IUCN and also includes historically extinct species and the presumed date of extinction [5]

Contents

Summary of 2006 IUCN Red List categories

Status iucn3.1.svgNear ThreatenedLeast ConcernLeast Concern

Conservation status [v2021-2, the data is current as of November 16, 2021]: [6]

EX - extinct,
EW - extinct in the wild
CR - critically endangered
EN - endangered
VU - vulnerable
NT - near threatened
LC - least concern
DD - data deficient
NE - not evaluated

Phylogeny

Living Anseriformes based on the work by John Boyd. [7]

Anhimae
Anhimidae

Anhima

Chauna

Anseres
Anseranatidae

Anseranas

Anatidae
Dendrocygninae

Thalassornis

Dendrocygna

?Plectropterinae

Plectropterus

Stictonettinae

Stictonetta

Anserinae
?Nettapodini

Nettapus

Biziurini

Biziura

Oxyurini

Heteronetta

Nomonyx

Oxyura

Anserini
Malacorhynchina

Malacorhynchus

Cereopsina

Coscoroba

Cereopsis

Cygnina

Sthenelides

Cygnus

Anserina

Branta

Anser

Anatinae
Tadornini
Merganettina

Merganetta

Chleophagina

Chloephaga

Oressochen

Neochen

Tadornina

Radjah

Tadorna

Alopochen

Mergini

Histrionicus

Camptorhynchus

Clangula

Somanterina

Polysticta

Somateria

Mergina

Melanitta

Bucephala

Mergellus

Lophodytes

Mergus

Cairinini

Cairina

Aix

Callonettini

Callonetta

? Salvadorina

Aythyini

Chenonetta

Hymenolaimus

Sarkidiornis

Pteronetta

Cyanochen

Marmaronetta

Asarcornis

Netta

Metopiana

Aythya

Anatini

Sibirionetta

Spatula

Tachyeres

Lophonetta

Amazonetta

Speculanas

Mareca

Anas

Species

Family Anhimidae (Screamers)

Family Anseranatidae (magpie goose)

Family †Presbyornithidae

Family †Paranyrocidae

Family Anatidae (ducks, geese, swans)

Anatidae incertae sedis

Subfamily †Romainvilliinae

Subfamily †Dendrocheninae

Subfamily Dendrocygninae

  • Genus Thalassornis Eyton 1838
    • Thalassornis leuconotus Eyton 1838 (white-backed duck) LC
      • T. l. leuconotusEyton 1838 (African white-backed duck)
      • T. l. insularis(Richmond 1897) (Madagascan white-backed duck)
  • Genus Dendrocygna Swainson 1837 (whistling/tree ducks)
    • Subgenus ( Lamprocygna ) Boetticher 1949
      • Dendrocygna viduata (Linnaeus 1766) (white-faced whistling-duck) LC
      • Dendrocygna autumnalis (Linnaeus 1758) (black-bellied whistling-duck) LC
        • D. a. fulgensFriedmann 1947 (Northern black-bellied whistling duck)
        • D. a. autumnalis(Linnaeus 1758) (Southern black-bellied whistling duck)
    • Subgenus ( Nesocygna ) Boetticher 1949
    • Subgenus ( Dendrocygna ) Swainson 1837
      • Dendrocygna bicolor (Vieillot 1816) (fulvous whistling-duck) LC
      • Dendrocygna eytoni (Eyton 1838) (plumed whistling-duck) LC
      • Dendrocygna javanica (Horsfield 1821) (lesser whistling-duck) LC
      • Dendrocygna arcuata (Horsfield 1824) (wandering whistling-duck) LC
        • D. a. arcuata(Horsfield 1824) (East Indian wandering whistling duck)
        • D. a. pygmaeaMayr 1945 (lesser wandering whistling duck)
        • D. a. australisReichenbach 1850 (Australian wandering whistling duck)

Subfamily Plectropterinae

  • Genus Plectropterus Stephens 1824
    • Plectropterus gambensis (Linnaeus 1766) Stephens 1824 (spur-winged goose) LC
      • P. g. gambensis(Linnaeus 1766) (Gambian spur-winged goose)
      • P. g. nigerSclater 1877 (black spur-winged goose)

Subfamily Stictonettinae

Subfamily Anserinae

Phylogeny of Cygnus [8]
( Sthenelides )

C. melancoryphus

( Chenopis )

C. atratus

( Cygnus )

C. olor

( Olor )

C. buccinator

C. cygnus

C. columbianus

Phylogeny of Branta [8]
( Branta )

B. bernicla

( Leucopareia )

B. ruficollis

( Leucoblepharon )

B. sandvicensis

B. canadensis

B. leucopsis

B. hutchinsii

        • Branta dickey Miller 1924
        • Branta esmeralda Burt 1929
        • Branta howardae Miller 1930
        • Branta hypsibata (Cope 1878)
        • Branta propinqua Schufeldt 1892
        • Branta rhuax (Wetmore 1943) Olson 2013 (Giant Hawai'i/Wetmore's goose)
        • Branta thessaliensis Boev & Koufos 2006
        • Subgenus ( Branta ) Scopoli 1769
          • Branta bernicla (Linnaeus 1758) (brent goose) LC
            • B. b. bernicla(Linnaeus 1758) (Dark-bellied Brant Goose)
            • B. b. nigricans(Lawrence 1846) (black-bellied Brant goose)
            • B. b. hrota(Müller 1776) (pale-bellied brant)
        • Subgenus ( Leucopareia ) Reichenbach 1852
        • Subgenus ( Leucoblepharon ) Baird 1858
          • Branta leucopsis (Bechstein 1803) (barnacle goose) LC
          • Branta hutchinsii (Richardson 1832) (cackling goose) LC
            • B. h. leucopareia(von Brandt 1836) (Aleutian/Bering cackling goose)
            • B. h. minimaRidgway 1885 (Small cackling goose)
            • B. h. taverneriDelacour 1951 (Taverner's cackling goose)
            • B. h. hutchinsii(Richardson 1832) (Richardson's cackling goose)
          • Branta hylobadistes Olson & James 1991 (Greater nene, Nēnē-nui)
          • Branta sandvicensis (Vigors 1834) (Hawaiian goose) VU D1
          • Branta canadensis (Linnaeus 1758) (Canada goose) LC
            • B. c. occidentalis(Baird 1858) (dusky Canada goose)
            • B. c. fulvaDelacour 1951 (Vancouver Canada goose)
            • B. c. maximaDelacour 1951 (giant Canada goose)
            • B. c. moffittiAldrich 1946 (Great Basin Canada goose)
            • B. c. parvipes(Cassin 1852) (Athabaska Canada goose)
            • B. c. interiorTodd 1938 (Interior Canada goose)
            • B. c. canadensis(Linnaeus 1758) (Atlantic Canada goose)
      • Genus Anser Brisson 1760 (true geese)
Phylogeny of Anser [8]
( Eulabeia )

A. indicus

( Chen )

A. canagicus

A. rossii

A. caerulescens

( Anser )

A. anser

A. cygnoides

A. erythropus

A. albifrons

A. fabalis

A. brachyrhynchus

A. middendorffii

A. serrirostris

        • Anser arenosus Bickart 1990
        • Anser arizonae Bickart 1990
        • Anser azerbaidzhanicus Serebrovsky 1940
        • Anser devjatkini Kuročkin 1971
        • Anser djuktaiensis Zelenkov & Kuročkin 2014
        • Anser eldaricus Burchak-Abramovich & Gadzyev 1978
        • Anser pratensis (Short 1970)
        • Anser tchikoicus Kuročkin 1985
        • Anser thompsoni Martin & Mengel 1980
        • Anser thraceiensis Burchak-Abramovich & Nikolov 1984
        • Anser udabnensis Burchak-Abramovich 1957
        • Subgenus ( Eulabeia ) Reichenbach 1852
        • Subgenus ( Chen ) Boie 1822
          • Anser pressa (Wetmore 1933) Brodkorb 1964 (Dwarf Snow goose)
          • Anser canagicus (Sevastianov 1802) (emperor goose) NT
          • Anser rossii Cassin 1861 (Ross's goose) LC
          • Anser caerulescens (Linnaeus 1758) (snow goose) LC
            • A. c. atlanticaKennard 1927 (greater snow goose)
            • A. c. caerulescens(Linnaeus 1758) (lesser snow goose)
        • Subgenus ( Anser ) Brisson 1760
          • Anser anser (Linnaeus 1758) (greylag goose) LC
            • A. a. anser(Linnaeus 1758) (Western Greylag Goose)
            • A. a. rubrirostrisSwinhoe 1871 (Eastern Greylag Goose)
          • Anser cygnoides (Linnaeus 1758) (swan goose) VU A2bcd+3bcd+4bcd
          • Anser erythropus (Linnaeus 1758) (lesser white-fronted goose) VU A2bcd+3bcd+4bcd
          • Anser albifrons (greater white-fronted goose) LC
            • A. a. flavirostrisDalgety & Scott 1948 (Greenland white-fronted Goose)
            • A. a. albifrons(Scopoli 1769) (European white-fronted Goose)
            • A. a. elgasiDelacour & Ripley 1975 (Tule white-fronted goose)
            • A. a. gambelliHartlaub 1852 (Gambel's white-fronted goose)
            • A. a. sponsaBanks 2011 (Pacific white-fronted goose)
          • Anser fabalis (Latham 1787) (Taiga bean goose) LC
            • A. f. fabalis(Latham 1787) (western taiga bean Goose)
            • A. f. johanseniDelacour 1951 (West Siberian taiga bean goose)
          • Anser brachyrhynchus Baillon 1834 (pink-footed goose) LC
          • Anser middendorffii Severtsov 1873 (East Siberian taiga bean goose)
          • Anser serrirostris Gould 1852 (Tundra bean Goose)
            • A. s. rossicusButurlin 1933 (Russian tundra bean goose )
            • A. s. serrirostrisGould 1852 (East Siberian tundra bean goose)

Subfamily Anatinae

Phylogeny of Chloephaga [9]

C. poliocephala

C. rubidiceps

C. hybrida

C. picta

        • Chloephaga poliocephala Sclater 1857 (ashy-headed goose) LC
        • Chloephaga rubidiceps Sclater 1861 (ruddy-headed goose) LC
        • Chloephaga hybrida (Molina 1782) (kelp goose) LC
          • C. h. hybrida(Molina 1782) (lesser/Patagonian kelp goose)
          • C. h. malvinarumPhillips 1916 (greater/Falkland kelp goose)
        • Chloephaga picta (Gmelin 1789) (upland goose) LC
          • C. p. leucopteraGmelin 1789) (greater Upland/Magellan goose)
          • C. p. picta(Gmelin 1789) (lesser Upland/Magellan goose)
    • Subtribe Tadornina (shelducks)
Phylogeny of Tadorna [9]

? T. cristata

T. tadorna

T. cana

T. ferruginea

T. tadornoides

T. variegata

Phylogeny of Aythya [10]
( Nyroca )

? A. baeri

? A. innotata

A. nyroca

A. australis

( Aristonetta )

A. americana

A. ferina

A. valisineria

( Aythya )

? A. novaeseelandiae

? A. collaris

A. fuligula

A. affinis

A. marila

Phylogeny of Tachyeres [11]

T. brachypterus

T. pteneres

T. leucocephalus

T. patachonicus

Phylogeny of Spatula [11]
( Querquedula )

S. querquedula

( Punanetta )

S. hottentota

S. puna

S. versicolor

( Spatula )

S. platalea

S. discors

S. cyanoptera

S. smithii

S. clypeata

S. rhynchotis

        • Subgenus (Querquedula) Stephens 1824
        • Subgenus (Punanetta) Bonaparte 1856
          • Spatula hottentota (Eyton 1838) (blue-billed teal) LC
          • Spatula puna (Lichtenstein) Tschudi 1844 (puna teal) LC
          • Spatula versicolor Vieillot 1816 (silver teal) LC
            • S. v. fretensisKing 1831 (southern silver teal)
            • S. v. versicolorVieillot 1816 (northern silver teal)
        • Subgenus (Spatula) Boie 1822
          • Spatula platalea Vieillot 1816 (red shoveler) LC
          • Spatula discors Linnaeus 1766 (blue-winged teal) LC
          • Spatula cyanoptera Vieillot 1816 (cinnamon teal) LC
            • S. c. septentrionaliumSnyder & Lumsden 1951 (northern cinnamon teal)
            • S. c. tropicaSnyder & Lumsden 1951 (tropical cinnamon teal)
            • S. c. borreroiSnyder & Lumsden 1951 (Borrero's cinnamon teal)
            • S. c. orinoma(Oberholser 1906) (Andean cinnamon teal)
            • S. c. cyanopteraVieillot 1816 (Argentine cinnamon teal)
          • Spatula smithii (Hartert 1891) (Cape shoveler) LC
          • Spatula clypeata (Linnaeus 1758) (northern shoveler) LC
          • Spatula rhynchotis Latham 1801 (Australian shoveler) LC
            • S. r. variegata(Gould 1856) (New Zealand shoveler)
            • S. r. rhynchotisLatham 1801 (Australian shoveler)
      • Genus Mareca Stephens 1824
Phylogeny of Mareca [11]
( Eunetta )

M. falcata

( Chaulelasmus )

M. strepera

( Mareca )

M. penelope

M. sibilatrix

M. americana

        • Subgenus (Eunetta) Bonaparte 1856
        • Subgenus (Chaulelasmus) Bonaparte 1838
          • Mareca strepera (Linnaeus 1758) (gadwall) LC
            • M. s. couesi(Streets 1876) (Coues'/Washington Island gadwall)
            • M. s. strepera(Linnaeus 1758) (Holarctic gadwall)
        • Subgenus (Mareca) Stephens 1824 (Widgeons)
      • Genus Anas Linnaeus 1758
Phylogeny of Mareca [11]
( Anas )

A. sparsa

A. melleri

A. undulata

A. laysanensis

A. wyvilliana

A. luzonica

A. superciliosa

A. poecilorhyncha

A. zonorhyncha

A. platyrhynchos

A. rubripes

? A. diazi

A. fulvigula

( Dafilonettion )

A. crecca

A. carolinensis

A. flavirostris

A. andium

( Dafila )

A. capensis

A. bahamensis

A. erythrorhyncha

A. georgica

A. acuta

A. eatoni

( Virago )

A. castanea

? A. albogularis

? A. gibberifrons

A. gracilis

( Nesonetta )

A. bernieri

A. chlorotis

A. aucklandica

A. nesiotis

        • Anas apscheronica Burchak-Abramovisch 1958
        • Anas bunkeri (Wetmore 1944)
        • Anas elapsa DeVis 1888 (Chinchilla Late Pleistocene of Condamine River, Australia)
        • Anas gracilipes DeVis 1905 (Late Pleistocene of Australia)
        • Anas itchtucknee McCoy 1963
        • Anas kisatibiensis (Early Pliocene of Kisatibi, Georgia)
        • Anas kurochkini Zelenkov & Panteleyev 2015
        • Anas lambrechti (Spillman 1942)
        • Anas moldovica (Late Pliocene of Tchichmiknaia, Moldova?Georgia?)
        • Anas sansaniensis Milne-Edwards 1867
        • Anas schneideri Emslie 1985
        • Anas strenua DeVis 1905 (Late Pleistocene of Patteramordu, Australia)
        • Subgenus (Anas) Linnaeus 1758
          • Anas pachyscelus Wetmore 1960 (Bermuda Islands flightless duck)
          • Anas sparsa Eyton 1838 (African black duck) LC
            • A. s. leucostigmaRüppell 1845 (pink-billed black duck)
            • A. s. sparsaEyton 1838 (South African black duck)
          • Anas melleri Sclater 1865 (Meller's duck) EN C2a(ii)
          • Anas undulata Dubois 1839 (yellow-billed duck) LC
            • A. u. ruppelliBlyth 1855 (northern yellow-billed duck)
            • A. u. undulataDubois 1839 (southern yellow-billed duck)
          • Anas laysanensis Rothschild 1892 (Laysan duck) CR B1ac(iv)
          • Anas wyvilliana Sclater 1878 (Hawaiian duck) EN B1ab(ii,iii,iv,v)
          • Anas luzonica Fraser 1839 (Philippine duck) VU A2bcd
          • Anas superciliosa Gmelin 1789 (Pacific black duck) LC
            • A. s. pelewensisHartlaub & Finsch 1872 (Pacific Islands gray duck)
            • A. s. superciliosaGmelin 1789 (Australasian grey duck)
          • Anas oustaleti Salvadori 1894 (Mariana/Oustalet's mallard)
          • Anas poecilorhyncha Forster 178 (Indian spot-billed duck) LC
            • A. p. haringtoni(Oates 1907) (Burmese spot-billed duck)
            • A. p. poecilorhynchaForster 1781 (Indian spot-billed duck)
          • Anas zonorhyncha Swinhoe 1866 (Chinese spot-billed duck) LC
          • Anas platyrhynchos Linnaeus 1758 (mallard) LC
            • A. p. conboschasBrehm 1831 (Greenland mallard)
            • A. p. platyrhynchosLinnaeus 1758 (European mallard)
          • Anas rubripes Brewster 1902 (American black duck) LC
          • Anas diazi Ridgway 1886 (Mexican mallard)
          • Anas fulvigula Ridgway 1874 (mottled duck) LC
            • A. f. maculosaSennett 1889 (Gulf Coast mottled duck)
            • A. f. fulvigulaRidgway 1874 (Florida mottled duck)
        • Subgenus (Dafilonettion) Boetticher 1937
          • Anas greeni (Brodkorb 1964)
          • Anas ogallalae (Brodkorb 1962)
          • Anas crecca Linnaeus 1758 (common teal) LC
            • A. c. creccaLinnaeus 1758 (Eurasian teal)
            • A. c. nimiaFriedmann 1948 (Aleutian common teal)
          • Anas carolinensis Gmelin 1789 (Green-winged teal)
          • Anas andium (Sclater & Salvin 1873) (Andean teal) LC
            • A. a. altipetens(Conover 1941) (Mérida teal)
            • A. a. andium(Sclater & Salvin 1873) (Andean teal)
          • Anas flavirostris Vieillot 1816 (yellow-billed teal) LC
            • A. f. oxypteraMeyen 1834 (Sharp-winged teal)
            • A. f. flavirostrisVieillot 1816 (Yellow-billed teal)
        • Subgenus (Dafila) Stephens 1824
          • Anas cheuen Agnolín 2006
          • Anas capensis Gmelin 1789 (Cape teal) LC
          • Anas bahamensis Linnaeus 1758 (white-cheeked pintail) LC
            • A. b. galapagensis(Ridgway 1890) (Galapagos white-cheeked pintail)
            • A. b. bahamensisLinnaeus 1758 (lesser white-cheeked pintail)
            • A. b. rubrirostrisVieillot 1816 (greater white-cheeked pintail)
          • Anas erythrorhyncha Gmelin 1789 (red-billed teal) LC
          • Anas acuta Linnaeus 1758 (northern pintail) LC
          • Anas eatoni (Sharpe 1875) (southern pintail) VU
            • A. e. drygalskiiReichenow 1904 (Crozet Islands pintail)
            • A. e. eatoni(Sharpe 1875) (Kerguelen Islands pintail)
          • Anas georgica Gmelin 1789 (yellow-billed pintail) LC
            • A. g. georgicaGmelin 1789 (South Georgia pintail)
            • A. g. niceforoiWetmore & Borrero 1946 (Niceforo's pintail)
            • A. g. spinicaudaVieillot 1816 (Chilean yellow-billed pintail)
        • Subgenus (Virago) Newton 1872
        • Subgenus (Nesonetta) Gray 1844

Related Research Articles

<span class="mw-page-title-main">Anatidae</span> Biological family of water birds

The Anatidae are the biological family of water birds that includes ducks, geese, and swans. The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica. These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water. The family contains around 174 species in 43 genera.

<span class="mw-page-title-main">Anseriformes</span> Order of water birds

Anseriformes is an order of birds also known as waterfowl that comprises about 180 living species of birds in three families: Anhimidae, Anseranatidae, and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the order are highly adapted for an aquatic existence at the water surface. With the exception of screamers, males have penises, a trait that has been lost in the Neoaves. Due to their aquatic nature, most species are web-footed though this one is not.

<i>Anas</i> Genus of birds

Anas is a genus of dabbling ducks. It includes the pintails, most teals, and the mallard and its close relatives. It formerly included additional species but following the publication of a molecular phylogenetic study in 2009 the genus was split into four separate genera. The genus now contains 31 living species. The name Anas is the Latin for "duck".

<span class="mw-page-title-main">Brazilian teal</span> Species of bird

The Brazilian teal or Brazilian duck is the only duck in the genus Amazonetta. It is widely distributed in eastern South America.

<i>Chloephaga</i> Genus of birds

Chloephaga is a genus of sheldgeese in the family Anatidae. Other sheldgeese are found in the genera Alopochen and Neochen.

<i>Anser</i> (bird) Genus of birds

Anser is a waterfowl genus that includes the grey geese and the white geese. It belongs to the true goose and swan subfamily of Anserinae under the family of Anatidae. The genus has a Holarctic distribution, with at least one species breeding in any open, wet habitats in the subarctic and cool temperate regions of the Northern Hemisphere in summer. Some also breed farther south, reaching into warm temperate regions. They mostly migrate south in winter, typically to regions in the temperate zone between the January 0 °C (32 °F) and 5 °C (41 °F) isotherms.

This is a list of the fauna of Finland. Finland borders Sweden to the west, Russia to the east, and Norway to the north, while Estonia lies to its south across the Gulf of Finland, allowing an ecological mix. Finland contains many species of mammals, birds, and fish, but only a few reptiles and amphibians. This article discusses all the vertebrate animals which can be found on Finland itself, not the oceans.

Tyzzeria is a genus of parasitic alveolates that with one exception infect the cells of the small intestine.

<span class="mw-page-title-main">Faunia</span> Zoo and a botanical garden in Madrid

Faunia is a zoo and a botanical garden located in Madrid, Spain. It covers about fourteen square hectares and is organized into areas representing different ecosystems, such as jungle, polar regions, and African forest. It is owned by Parques Reunidos, SA.

<span class="mw-page-title-main">The Murrough Wetlands</span> Complex of wetlands in County Wicklow, Ireland

The Murrough Wetlands are a 15-kilometre (9.32 mi) long complex of coastal wetlands in County Wicklow, Ireland. The main wetland is centred around Broad Lough immediately north of Wicklow town. Broad Lough is a large estuarine lake that is cut off from the Irish sea by a long, thin shingle ridge. Smaller, disconnected wetland areas such as the East Coast Nature Reserve and the Kicoole Marshes are also included in the complex. The Murrough Wetlands are the most extensive wetland area on the east coast of Ireland, and are an EU-designated Special Area of Conservation and Special Protection Area.

References

  1. Gill, F; Donsker, D. (eds.). "Comparison of IOC 8.1 with other world lists". IOC World Bird List . doi:10.14344/IOC.ML.8.1 . Retrieved 30 December 2017.
  2. Çınar, Ümüt (November 2015). "02 → Gᴀʟʟᴏᴀɴsᴇʀᴀᴇ : Aɴsᴇʀɪfᴏʀᴍᴇs". English Names of Birds . Retrieved 30 December 2017.
  3. Haaramo, Mikko (2007). "Anseriformes– waterfowls". Mikko's Phylogeny Archive. Retrieved 30 December 2017.
  4. "Taxonomic lists- Aves". Paleofile.com (net, info). Archived from the original on 11 January 2016. Retrieved 30 December 2017.
  5. BirdLife and Lynx publish first illustrated world bird checklist Adrian Long, 22 Aug 2014
  6. IUCN (2021). "IUCN Red List of Threatened Species". IUCN Red List (2021-2 ed.). Retrieved 16 November 2021.
  7. Boyd, John (2007). "Genus-level tree for Anseriformes" (PDF). John Boyd's website. Retrieved 30 December 2017.
  8. 1 2 3 Boyd, John (2007). "Anserini: Swans and Geese" (PDF). John Boyd's website. Retrieved 30 December 2017.
  9. 1 2 Boyd, John (2007). "Tadornini: Shelducks and Sheldgeese" (PDF). John Boyd's website. Retrieved 30 December 2017.
  10. Boyd, John (2007). "Aythyini: Diving Ducks" (PDF). John Boyd's website. Retrieved 30 December 2017.
  11. 1 2 3 4 Boyd, John (2007). "Anatini: Dabbling Ducks" (PDF). John Boyd's website. Retrieved 30 December 2017.