Animalia > Chordata > Aves > Anseriformes > Anatidae > Anas > Anas sibilatrix

Anas sibilatrix (Chiloe Wigeon)

Wikipedia Abstract

The Chiloé wigeon (Anas sibilatrix), also known as the southern wigeon, is one of three extant species of wigeon in the genus Anas of the dabbling duck subfamily. This bird is indigenous to the southern part of South America, including the Chiloé Archipelago.In its native range, it is called the pato overo ("piebald duck") or pato real ("royal duck"), although the latter name also refers to the Muscovy in the wild.Its specific epithet, sibilatrix, means 'whistler', referring to the bird's call.
View Wikipedia Record: Anas sibilatrix

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 2.10772
EDGE Score: 1.13389


Adult Weight [1]  1.95 lbs (884 g)
Birth Weight [2]  53 grams
Diet [3]  Herbivore
Diet - Plants [3]  100 %
Forages - Ground [3]  70 %
Forages - Water Surface [3]  30 %
Clutch Size [5]  6
Incubation [4]  25 days


Name Countries Ecozone Biome Species Report Climate Land
Alta Paraná Atlantic forests Brazil, Paraguay, Argentina Neotropic Tropical and Subtropical Moist Broadleaf Forests
Dry Chaco Bolivia, Paraguay, Argentina Neotropic Tropical and Subtropical Dry Broadleaf Forests
Espinal Argentina Neotropic Temperate Grasslands, Savannas, and Shrublands
Humid Pampas Argentina Neotropic Temperate Grasslands, Savannas, and Shrublands
Low Monte Argentina Neotropic Temperate Grasslands, Savannas, and Shrublands
Magellanic subpolar forests Chile, Argentina Neotropic Temperate Broadleaf and Mixed Forests
Paraná flooded savanna Argentina Neotropic Flooded Grasslands and Savannas
Patagonian steppe Chile, Argentina Neotropic Temperate Grasslands, Savannas, and Shrublands
Southern Andean steppe Argentina, Chile Neotropic Montane Grasslands and Shrublands
Uruguayan savanna Uruguay, Brazil, Argentina Neotropic Tropical and Subtropical Grasslands, Savannas, and Shrublands
Valdivian temperate forests Chile, Argentina Neotropic Temperate Broadleaf and Mixed Forests

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Bañados del Este Wetland Reserve 986054 Uruguay  
Bosques Petrificados Monumental Natural National Monument III 151218 Santa Cruz, Argentina  
Lago Puelo National Park II 47607 Chubut, Argentina
Laguna Blanca National Park II 19735 Neuquen, Argentina  
Lanín National Park II 536819 Neuquen, Argentina
Los Alerces National Park II 463045 Chubut, Argentina  
Los Glaciares National Park II 1329020 Santa Cruz, Argentina
Nahuel Huapi National Park II 759703 Argentina  
Parque Atlantico Mar Chiquita Nature Reserve VI 706059 Cordoba, Argentina  
Parque Nacional Laguna San Rafael National Park II 4560904 Aisén, Chile  
Parque Nacional Torres del Paine National Park II 542393 Magallanes, Chile  
Perito Moreno National Park II 234320 Santa Cruz, Argentina  
Reserva Natural Otamendi Strict Nature Reserve Ia   Buenos Aires, Argentina  
Santuario de la Naturaleza Pumalín Sanctuary 713364 Chile
Severn Estuary/ Môr Hafren 182155 England/Wales, United Kingdom
Tierra Del Fuego National Park II 172861 Argentina

Biodiversity Hotspots

Name Location Endemic Species Website
Atlantic Forest Argentina, Brazil, Paraguay, Uruguay No
Chilean Winter Rainfall-Valdivian Forests Chile No

Prey / Diet

Argentina anserina subsp. anserina (Pacific Silverweed)[4]
Polygonum aviculare (Prostrate knotweed)[6]


Parasitized by 
Capillaria anatis <Unverified Name>[7]
Cloacotaenia megalops[7]
Zygocotyle lunata[7]

Institutions (Zoos, etc.)

Institution Infraspecies / Breed 
Albuquerque Biological Park
Alexandria Zoological Park
Arundel Wildfowl & Wetlands Trust
Audubon Zoo
Beale Park
Bellewaerde Park
Bioparc Valencia
Birmingham Zoo
Blackbrook Zoological Park
BREC's Baton Rouge Zoo
Bristol Zoo Gardens
Budapest Zool.& Botanical Garden
Buffalo Zoological Gardens
Caldwell Zoo
Canolfan Llanelli Centre W&WTrust
Castle Espie Wildfowl & Wetlands Trust
Cincinnati Zoo & Botanical Garden
Cologne Zoo
Cotswold Wildlife Park and Gardens
Curraghs Wildlife Park
David Traylor Zoo of Emporia
Denver Zoological Gardens
Edinburgh Zoo-Scottish National Zoo
Espace Zoolog de St-Martin-la-Plaine
Flamingo Park Wildlife Encounter
Fota Wildlife Park
Greenville Zoo
Guadalajara Zoo
Hong Kong Zool. & Botanical Gardens
Jardin Zoologico de Cdad.Buenos Aires
Jurong Birdpark, Singapore
London Wetland Centre (W&WT)
Lotherton Bird Garden
Louisville Zoological Garden
Martin Mere Wildfowl & Wetlands Trust
Miami Metrozoo
Miejski Ogrod Zoologiczny Wybrzeza
Montgomery Zoo
Moscow Zoological Park
Nashville Zoo at Grassmere
Ogrod Zoologiczny w Poznaniu
Omaha's Henry Doorly Zoo
Paignton Zoo Environmental Park
Palm Beach Zoo at Dreher Park
Paradise Park Wildlife Sanctuary
Parc des Oiseaux
Parc Paradisio S.A.
Parc Zoologic de Barcelona
Parc Zoologique De Cleres (MNHN)
Parque De Animales Silvestres Temaikèn
Pensthorpe Conservation Trust Limited
Roger Williams Park Zoo
Sacramento Zoo
Safaripark Beekse Bergen
Saint Louis Zoological Park
Saitama Children's Zoo
Salisbury Zoological Park
San Antonio Zoological Gardens & Aquar
San Diego Wild Animal Park
San Diego Zoo
Sedgwick County Zoo
Slimbridge New Grounds W&WTrust
Sunset Zoo
Tampa's Lowry Park Zoo
Texas Zoo
Thoiry Zoological Park
Tiergarten Bernburg
Tiergarten der Stadt Wels
Tilgate Nature Centre
Tracy Aviary
Vogelpark (Birdpark) Avifauna
Washington Waterfowl Park W&WT
Welsh Mountain Zoo
Westfalischer Zoologischer Gtn Munster
Whipsnade Wild Animal Park
Wildlife World Zoo
Woodland Park Zoological Gardens
Wroclaw Zoo, LLC
Zoo de Doue-la-Fontaine
Zoo de Jurques
Zoo de La Fleche
Zoo de Santillana y Parque Cuaternario
Zoo Dresden GmbH
Zoologická a botanická zahrada Plzen
Zoologischer Garten Augsburg GmbH
Zoologischer Garten Halle GmbH
Zoologischer Garten Magdeburg

Range Map



Attributes / relations provided by
1A comparative study of egg mass and clutch size in the Anseriformes, Jordi Figuerola and Andy J. Green, J Ornithol (2006) 147: 57–68
2Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
3Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
4del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
5Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
6Agüero, M. L., Borboroglu, P. G., & Esler, D. (2014). Trophic ecology of breeding white-headed steamer-duck (Tachyeres leucocephalus). Waterbirds, 37(1), 88-93.
7Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Protected Areas provided by Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
GBIF Global Biodiversity Information Facility
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access