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]  1.949 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


Protected Areas

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]

Prey / Diet Overlap


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

Institutions (Zoos, etc.)

Range Map


External References



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
Abstract provided by DBpedia licensed under a Creative Commons License