Spectacled duck (Speculanas specularis)

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Spectacled duck, side view
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Spectacled duck fact file

Spectacled duck description

KingdomAnimalia
PhylumChordata
ClassAves
OrderAnseriformes
FamilyAnatidae
GenusSpeculanas (1)

With its highly distinctive head and neck pattern, the spectacled duck is unmistakeable (3). From the neck up, this medium-sized dabbling duck is dark brown, except for conspicuous patches of pure white in front of the eye and extending from the throat around the neck (2) (3) (4). The upperparts of the body are generally dark chocolate brown, with light brown scalloping along the back, while underneath it is paler grey to light brown (2). An iridescent patch of purplish-bronze, known as the speculum, on each of the mainly black wings, gives rise to this species alternative common name (2) (3) (4). The sexes are similar in appearance, although the female is slightly duller, and the juveniles usually lack the distinctive white facial markings (3) (4).

Also known as
Bronze-winged duck.
Synonyms
Anas specularis.
Size
Length: 46-54 cm (2)
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Spectacled duck biology

This generally retiring species is typically found in pairs or small groups. It feeds on the seeds, leaves and stems of aquatic plants, but will also take some aquatic invertebrates, and feed on leaf litter in forests away from water. Breeding takes place form September to October, with egg-laying reaching a peak between October and November. The incubation period in captivity has been recorded to be around 30 days (2).

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Spectacled duck range

The spectacled duck is most common in the Andean valleys of southern Chile and west-central Argentina, south as far as Tierra del Fuego (2) (3) (4).

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Spectacled duck habitat

This species breeds mostly by rivers, fast-flowing streams and mountain lakes in densely wooded areas (2) (3) (4).

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Spectacled duck status

Classified as Near Threatened (NT) on the IUCN Red List (1).

IUCN Red List species status – Near Threatened

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Spectacled duck threats

Although the spectacled duck population is estimated at fewer than 10,000 individuals, there are no major threats to this species, and its numbers appear to be stable. There is however some concern that various factors, including predation by introduced American mink, increased tourism pressure, and salmon farming and trout stocking on Chilean rivers, could impact negatively on the spectacled duck population (2).

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Spectacled duck conservation

At present there are no known conservation measures for the spectacled duck but significant populations of this species occur within several protected areas in both Chile and Argentina. Furthermore proposals have been made for further research into the potential threats this species faces from predation, tourism and fish farming (2).

View information on this species at the UNEP World Conservation Monitoring Centre.
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Find out more

To find out more about the conservation of wildfowl see:

For more information on this and other bird species please see:

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Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact: arkive@wildscreen.org.uk
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Glossary

Incubation
The act of incubating eggs, that is, keeping them warm so that development is possible.
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References

  1. IUCN Red List (May, 2009)
    http://www.iucnredlist.org
  2. BirdLife International (May, 2009)
    http://www.birdlife.org/datazone/species/index.html?action=SpcHTMDetails.asp&sid=425&m=0
  3. Ogilvie, M. and Young, S. (1998) Photographic handbook of the wildfowl of the world. New Holland Publishers, London.
  4. Blake, E.R. (1977) Manual of Neotropical Birds. Volume I: Spheniscidae (Penguins) to Laridae (Gulls and Allies). University of Chicago Press, Chicago.
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Image credit

Spectacled duck, side view  
Spectacled duck, side view

© James Brunker / www.magicalandes.com

James Brunker
Magical Andes Photography
Edf. Orion Dpto #1704, Av. Sanchez Lima #2054 Esq.. Aspiazu, Sopocachi, La Paz
Bolivia
Tel: +591 (0) 2 2910929
magicalandesphotos@yahoo.com
http://www.magicalandes.com

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