Meller's duck (''Anas melleri'') is a
species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of ...
of the
dabbling duck
The Anatinae are a subfamily of the family Anatidae (swans, geese and ducks). Its surviving members are the dabbling ducks, which feed mainly at the surface rather than by diving. The other members of the Anatinae are the extinct moa-nalo, a yo ...
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...
''Anas''. It is
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...
to eastern
Madagascar
Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...
. Although a population was established on
Mauritius
Mauritius ( ; french: Maurice, link=no ; mfe, label=Mauritian Creole, Moris ), officially the Republic of Mauritius, is an island nation in the Indian Ocean about off the southeast coast of the African continent, east of Madagascar. It incl ...
in the mid-18th century, this is on the verge of extinction due to habitat loss and competition by feral
domestic duck
The domestic duck or domestic mallard (''Anas platyrhynchos domesticus'') is a subspecies of mallard that has been domesticated by humans and raised for meat, eggs, and down feathers. A few are also kept for show, as pets, or for their ornament ...
s.
The species name of this species is after the
botanist Charles James Meller
Charles is a masculine given name predominantly found in English and French speaking countries. It is from the French form ''Charles'' of the Proto-Germanic name (in runic alphabet) or ''*karilaz'' (in Latin alphabet), whose meaning was ...
, and its generic name is from the
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power ...
for "duck".
Description

The Meller's duck resembles a large female
mallard
The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa, and has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...
. At , it averages slightly larger than a mallard and is at the top size for the genus ''
Anas
''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 s ...
''.
Meller’s duck (''Anas melleri'')
. arkive.org However, as opposed to most mallard relatives, they lack a supercilium
The supercilium is a plumage feature found on the heads of some bird species. It is a stripe which runs from the base of the bird's beak above its eye, finishing somewhere towards the rear of the bird's head.Dunn and Alderfer (2006), p. 10 Also k ...
. The speculum feathers
The speculum is a patch, often distinctly coloured, on the secondary wing feathers, or ''remiges'', of some birds.
Examples of the colour(s) of the speculum in a number of ducks are:
* Common teal and green-winged teal: Iridescent green edged ...
are green as in some of its relatives, but unlike in these, it is bordered white as in the mallard. Its body is dark brown with narrow paler fringes to feathers on upper parts and wider fringes on lower parts. Its bill is pale grey, with dark patches at the base, and is larger than normal. Its feet and legs are orange.[
]
Behaviour
Meller's duck breeds apparently during most of the year except May–June on Madagascar, dependent on local conditions; the Mauritian population has been recorded to breed in October and November. Unlike most of their closer relatives—with the exception of the African black duck
The African black duck (''Anas sparsa'') is a species of duck of the genus ''Anas''. It is genetically closest to the mallard group, but shows some peculiarities in its behavior and (as far as they can be discerned) plumage; it is accordingly pla ...
—they are fiercely territorial during the breeding season; furthermore, pairs remain mated until the young are independent.
Conservation
This species is listed as an endangered species by the IUCN Red List
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...
. The Lac Alaotra
Lake Alaotra ( mg, farihin' Alaotra, ; french: Lac Alaotra) is the largest lake in Madagascar, located in Alaotra-Mangoro Region and on the island's northern central plateau. Its basin is composed of shallow freshwater lakes and marshes surrounded ...
wetlands, where historically the largest number of these birds was to be found, have suffered habitat destruction
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...
on a large scale in the latter half of the 20th century, and local waterbird populations have declined dramatically. The Madagascar pochard was rediscovered in 2006, though not in the Lac Alaotra area.
The conservation of this species was long hampered by its—entirely erroneous, see below—dismissal as a variant of the mallard which deserved no special interest. Due to its drab plumage and territorial habits, this species is not very popular among aviculturalist
Aviculture is the practice of keeping and breeding birds, especially of wild birds in captivity.
Types
There are various reasons that people get involved in aviculture. Some people breed birds to preserve a species. Some people breed parrots a ...
s, although it reproduces readily in captivity like most ducks if enough space and good habitat are provided. Although a captive breeding program exists (part of the European Endangered Species Programme The EAZA Ex-situ Programme (EEP) is a population management and conservation programme by European Association of Zoos and Aquaria (EAZA) for wild animals living in European zoos. The programme was formerly known as the European Endangered Species ...
), the species is not very often kept in zoos either; it can be more frequently seen in Europe
Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located enti ...
, such as in EEP members Cologne Zoo, Edinburgh Zoo
Edinburgh Zoo, formerly the Scottish National Zoological Park, is an non-profit zoological park in the Corstorphine area of Edinburgh, Scotland.
The land lies on the south facing slopes of Corstorphine Hill, from which it provides extensive ...
, Durrell Wildlife Park
Jersey Zoo (formerly Durrell Wildlife Park) is a zoological park established in 1959 on the island of Jersey in the English Channel by naturalist and writer Gerald Durrell (1925–1995). It is operated by the Durrell Wildlife Conservation Trust. ...
, and Zürich Zoo.
Relations
Due to the outward similarity of Meller's duck to the female mallard, it was commonly placed close to that species. Based on records of quasi-forced hybridization under unnatural conditions,[ it was even proposed to be a mere color morph of the mallard.][
Nowadays, it is regarded as one of the most distinct species in the mallard group, based on ]behaviour
Behavior (American English) or behaviour ( British English) is the range of actions and mannerisms made by individuals, organisms, systems or artificial entities in some environment. These systems can include other systems or organisms as w ...
al and mtDNA
Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondrion, mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mit ...
D-loop
In molecular biology, a displacement loop or D-loop is a DNA structure where the two strands of a double-stranded DNA molecule are separated for a stretch and held apart by a third strand of DNA. An R-loop is similar to a D-loop, but in this cas ...
sequence
In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed and order matters. Like a set, it contains members (also called ''elements'', or ''terms''). The number of elements (possibly infinite) is called ...
comparisons.[ Its closest relatives is apparently the ]yellow-billed duck
The yellow-billed duck (''Anas undulata'') is a 51–58 cm long dabbling duck which is an abundant resident breeder in southern and eastern Africa. This duck is not migratory, but wanders in the dry season to find suitable waters. It is hi ...
, another early divergence of the mallard clade, in which these species and the African black duck
The African black duck (''Anas sparsa'') is a species of duck of the genus ''Anas''. It is genetically closest to the mallard group, but shows some peculiarities in its behavior and (as far as they can be discerned) plumage; it is accordingly pla ...
are basal
Basal or basilar is a term meaning ''base'', ''bottom'', or ''minimum''.
Science
* Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure
* Basal (medicine), a minimal level that is nec ...
, but the exact relationships of Meller's and the yellow-billed ducks to that species are fairly obscure. (The dates in these studies are probably far too recent in the face of the Early Pleistocene fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
record of mallards and the crude methodology used to arrive at the estimate.)
References
External links
BirdLife Species Factsheet
{{Taxonbar, from=Q917490
Meller's duck
Meller's duck
Endemic birds of Madagascar
Meller's duck
Meller's duck