Whistling duck

The whistling ducks or tree ducks are a subfamily, Dendrocygninae, of the duck, goose and swan family of birds, Anatidae. They are not true ducks. In other taxonomic schemes, they are considered a separate family, Dendrocygnidae. Some taxonomists list only one genus, Dendrocygna, which contains eight living species, and one undescribed extinct species from Aitutaki of the Cook Islands, but other taxonomists also list the white-backed duck (Thalassornis leuconotus) under the subfamily.

Whistling ducks
Black-bellied whistling duck
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Anseriformes
Family: Anatidae
Subfamily: Dendrocygninae
Reichenbach, 1850
Genus: Dendrocygna
Swainson, 1837
Type species
Anas arcuata
Horsfield, 1824

Taxonomy and evolution

Whistling ducks were first described by Carl Linnaeus in the 10th edition of Systema Naturae in 1758: the black-bellied whistling duck (then Anas autumnalis) and the West Indian whistling duck (then Anas arborea).[1] In 1837, William John Swainson named the genus Dendrocygna to distinguish whistling ducks from the other waterfowl.[2] The type species was listed as the wandering whistling duck (D. arcuata), formerly named by Thomas Horsfield as Anas arcuata.[3]

Whistling duck taxonomy, including that of the entire infraorder Anseriformes, is complicated and disputed.[4] Under a traditional classification proposed by ornithologist Jean Théodore Delacour based on morphological and behavioral traits,[5][6] whistling ducks belong to the tribe Dendrocygnini under the family Anatidae and subfamily Anserinae.[6][7] Following the revisions by ornithologist Paul Johnsgard, Dendrocygnini includes the genus Thalassornis (the white-backed duck) under this system.[7][8]

In 1997, Bradley C. Livezey proposed that Dendrocygna were a separate lineage from Anserinae, placing it and its tribe in its own subfamily, Dendrocygninae. Alternatively Charles Sibley and Jon Edward Ahlquist recommended placing Dendrocygna in its own family, Dendrocygnidae, which includes the genus Thalassornis.[6][7]

Simplified Anseriformes phylogeny[9][10][11]
 Anseriformes 
 
 Anatidae 
 
 

Anatinae (dabbling ducks)

 
 
 

Anserinae (swans and true geese)

 
 

Oxyurinae (stiff-tailed ducks and allies)

 
 
 
 

Dendrocygninae (whistling ducks)

 
 
 

Anseranatidae (magpie-geese)

 
 
 

Anhimidae (screamers)

 
 
Detailed Anatidae phylogeny[12]
 Anatidae 
 
 
 
 
 
 
 
 
 

other Anatidae

 
 

other Anatinae

 
 
 

all Anserinae

 
 

Oxyurinae, Nettapus, Malacorhynchus, Salvadorina

 
 

D. arcuata

 
 

D. javanica

 
 

Stictonetta

 
 
 
 
 
 

D. bicolor

 
 

D. eytoni

 
 
 
 
 
 

D. arborea

 
 

D. guttata

 
 
 
 

Thalassornis

 
 
 
 

D. autumnalis

 
 

D. viduata

 
 
 
Dendrocygninae
Stictonettinae
Dendrocygninae
Thalassorninae
Dendrocygninae

Species

Eight species of whistling duck are currently recognized in the genus Dendrocygna. However, Johnsgard considers the white-backed duck (Thalassornis leuconotus) from Africa and Madagascar to be distinct ninth species,[13] a view first proposed in 1960 and initially supported by behavioral similarities. Later, similarities in anatomy, duckling vocalizations, and feather proteins gave additional support.[8] Molecular analysis in 2009 also suggested that the white-backed duck was nested within the whistling duck clade.[12] In addition to the extant species, subfossil remains of an extinct, undescribed species have been found on Aitutaki of the Cook Islands.[14]

Common name Scientific name [lower-alpha 1] IUCN Red List Status Distribution Picture
Status Trend Population[lower-alpha 2]
West Indian whistling duck Dendrocygna arborea
(Linnaeus, 1758)		 VU IUCN[15] 6,000 - 15,000
Wandering whistling duck Dendrocygna arcuata
(Horsfield, 1824)		 LC IUCN[16]
Black-bellied whistling duck Dendrocygna autumnalis
(Linnaeus, 1758)		 LC IUCN[17]
Fulvous whistling duck Dendrocygna bicolor
(Vieillot, 1816)		 LC IUCN[18]
Plumed whistling duck Dendrocygna eytoni
(Eyton, 1838)		 LC IUCN[19]
Spotted whistling duck Dendrocygna guttata
Schlegel, 1866		 LC IUCN[20] 6,700 - 17,000
Lesser whistling duck Dendrocygna javanica
(Horsfield, 1821)		 LC IUCN[21]
White-faced whistling duck Dendrocygna viduata
(Linnaeus, 1766)		 LC IUCN[22]

Description

Whistling ducks are found in the tropics and subtropics. As their name implies, they have distinctive whistling calls.

The whistling ducks have long legs and necks, and are very gregarious, flying to and from night-time roosts in large flocks. Both sexes have the same plumage, and all have a hunched appearance and black underwings in flight.

Notes
  1. A binomial authority in parentheses indicates that the species was originally described in a genus other than Dendrocygna.
  2. Estimate for the number of mature individuals in the wild.
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References
  1. Linnaeus 1758, p. 127–128.
  2. Swainson 1837, p. 365.
  3. Eyton 1838, p. 28.
  4. Donne-Goussé, Laudet & Hänni 2002, p. 339.
  5. Johnsgard 1965, p. 14.
  6. Donne-Goussé, Laudet & Hänni 2002, pp. 340.
  7. Donne-Goussé, Laudet & Hänni 2002, pp. 353–354.
  8. Johnsgard 2010b, p. 26.
  9. Donne-Goussé, Laudet & Hänni 2002, p. 348.
  10. Gonzalez, Düttmann & Wink 2009, p. 313.
  11. Pereira & Baker 2009, p. 416.
  12. Eo, Bininda-Emonds & Carroll 2009, pp. 471–472.
  13. Johnsgard 2010a, p. 41.
  14. Steadman 2006, pp. 213 & 218.
  15. BirdLife International (2013). "Dendrocygna arborea". IUCN Red List of Threatened Species. 2013. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  16. BirdLife International (2012). "Dendrocygna arcuata". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  17. BirdLife International (2012). "Dendrocygna autumnalis". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  18. BirdLife International (2016). "Dendrocygna bicolor". IUCN Red List of Threatened Species. 2016: e.T22679746A92827620. doi:10.2305/IUCN.UK.2016-3.RLTS.T22679746A92827620.en.CS1 maint: uses authors parameter (link)
  19. BirdLife International (2012). "Dendrocygna eytoni". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  20. BirdLife International (2012). "Dendrocygna guttata". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  21. BirdLife International (2012). "Dendrocygna javanica". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)
  22. BirdLife International (2012). "Dendrocygna viduata". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)

Literature cited
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