Meller's duck (''Anas melleri'') is a species 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 ''Anas''. It is endemic to eastern Madagascar. Although a population was established on Mauritius in the mid-18th century, this is on the verge of extinction due to habitat loss and competition by feral domestic ducks. The species name of this species is after the

botanist Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek wo ...

Charles James Meller, and its generic name is from the Latin 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''.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 ...

. The speculum feathers 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 An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...

by the IUCN Red List. 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 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 species is not very often kept in zoos either; it can be more frequently seen in Europe, 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 v ...

, Durrell Wildlife Park, 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 Hybridization (or hybridisation) may refer to: *Hybridization (biology), the process of combining different varieties of organisms to create a hybrid *Orbital hybridization, in chemistry, the mixing of atomic orbitals into new hybrid orbitals *Nu ...

under unnatural conditions, it was even proposed to be a mere color

morph Morph may refer to: Biology * Morph (zoology), a visual or behavioral difference between organisms of distinct populations in a species * Muller's morphs, a classification scheme for genetic mutations * "-morph", a suffix commonly used in tax ...

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 wel ...

al and mtDNA D-loop sequence comparisons. Its closest relatives is apparently the yellow-billed duck, another early divergence of the mallard

clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...

, in which these species and the

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 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 (''Anas melleri'') is a species of the dabbling duck genus ''Anas''. It is endemic to eastern Madagascar. Although a population was established on Mauritius in the mid-18th century, this is on the verge of extinction due to habitat ...

Endemic birds of Madagascar