The Andean Crested Duck (Lophonetta specularioides alticola) is one of two subspecies

Subspecies

Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...

 of the Crested Duck

Crested Duck

The Crested Duck is a species of duck native to South America, the only member of the monotypic genus Lophonetta. It is sometimes included in Anas, but it belongs to a South American clade that diverged early in dabbling duck evolution . There are two subspecies: L...

. It is much rarer than its sibling subspecies, the Patagonian Crested Duck

Patagonian crested duck

The Patagonian Crested Duck , also known as the Southern Crested Duck, or the Grey Duck in the Falkland Islands, is the nominate of two subspecies of the Crested Duck.-Description:...

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Description

The Andean Crested Duck is a medium-sized duck

Duck

Duck is the common name for a large number of species in the Anatidae family of birds, which also includes swans and geese. The ducks are divided among several subfamilies in the Anatidae family; they do not represent a monophyletic group but a form taxon, since swans and geese are not considered...

 with a length of about 600 mm, a dark nuchal

Neck

The neck is the part of the body, on many terrestrial or secondarily aquatic vertebrates, that distinguishes the head from the torso or trunk. The adjective signifying "of the neck" is cervical .-Boner anatomy: The cervical spine:The cervical portion of the human spine comprises seven boney...

 crest and a long, pointed black tail. Its colouring is predominantly grey and brown. The forecrown, sides of the head and neck are pale, while the centre of the crown, the crest and the area behind the eyes are dark brown to black. Much of the body plumage is light brown mottled with darker markings. The wings are dark brown to black. The irides

Iris (anatomy)

The iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina. "Eye color" is the color of the iris, which can be green, blue, or brown. In some cases it can be hazel , grey, violet, or even pink...

 are yellow and the bill and feet dark grey. It is very similar to the nominate subspecies, differing in being slightly larger, browner and less mottled, with a darker purple speculum

Speculum feathers

The speculum is a patch, often distinctly coloured, on the inner remiges of some birds.Examples of the colour of the speculum in a number of ducks are:* Common Teal and Green-winged Teal: Iridescent green edged with buff....

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Distribution and habitat

The subspecies is found on lakes in the Andes

Andes

The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

 of South America

South America

South America is a continent situated in the Western Hemisphere, mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere. The continent is also considered a subcontinent of the Americas. It is bordered on the west by the Pacific Ocean and on the north and east...

, ranging at altitudes of 2,000-4,300 m above sea level

Above mean sea level

The term above mean sea level refers to the elevation or altitude of any object, relative to the average sea level datum. AMSL is used extensively in radio by engineers to determine the coverage area a station will be able to reach...

 from the Huánuco Region

Huánuco Region

Huánuco is a region in central Peru. It is bordered by the La Libertad, San Martín, Loreto and Ucayali regions on the north; the Ucayali Region on the east; the Pasco Region on the south; and the Lima and Ancash regions on the west. Its capital is the city of Huánuco.Huánuco has a rough topography...

 of central Peru

Peru

Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

 southwards through the mountains of Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

 to Talca Province

Talca Province

Talca Province is one of four provinces of the central Chilean region of Maule . Its capital is the city of Talca.-Administration:As a province, Talca is a second-level administrative division of Chile, governed by a provincial governor who is appointed by the president.-Communes:The province...

 in central Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

 and Mendoza Province

Mendoza Province

The Province of Mendoza is a province of Argentina, located in the western central part of the country in the Cuyo region. It borders to the north with San Juan, the south with La Pampa and Neuquén, the east with San Luis, and to the west with the republic of Chile; the international limit is...

 in northern Argentina

Argentina

Argentina , officially the Argentine Republic , is the second largest country in South America by land area, after Brazil. It is constituted as a federation of 23 provinces and an autonomous city, Buenos Aires...

. It generally breeds above 3,500 m asl.