The crested duck (Lophonetta specularioides) is a species of duck native to South America, the belonging to 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. specularioides alticola (Andean crested duck) and L. specularioides specularioides (Patagonian crested duck). The Patagonian crested duck is also called the southern crested duck and its range lies in the Falklands, Chile, and Argentina.
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- BirdLife International (2012). "Lophonetta specularioides". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Johnson, Kevin P. & Sorenson, Michael D. (1999). "Phylogeny and biogeography of dabbling ducks (genus Anas): a comparison of molecular and morphological evidence". Auk 116 (3): 792–805. doi:10.2307/4089339.
- Patagonian Crested Duck. Falklands.net
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