CHILIAN WIDGEON 
ANAS SIBILATRIX Poeppig 
(Plate 29) 
Synonymy 
Anas sihilatrix Poeppig, Froriep’s Notizen, vol. 31, p. 10, 1829. 
Anas chiloensis King, Proc. Zool. Soc. London, 1830, p. 15. 
Mareca chiloensis Eyton, Monograph Anatidse, p. 117, 1838. 
Anas parvirostris Merrem, in Ersch and Grube’s Encyclop., sect. 1, vol. 35, p. 43, 
1841. 
Sarkidiornis sihilatrix G. R. Gray, Genera of Birds, vol. 3, p. 605, 1845. 
Chaulelasmns chiloensis Lichtenstein, Nomenclator Avium Mus. Berol., p. 101, 1854. 
Mareca sihilatrix Sclater and Salvin, Proc. Zool. Soc. London, 1876, p. 395. 
Vernacular Names 
English: Chiloe Widgeon, Chilian Widgeon. 
German: Chilenische Pfeifente, Siidamerikanische Pfeifente. 
French: Siffleur du Chili, Mareque du Chili. 
Spanish: Pato real, Pato overo, Chiriri. 
DESCRIPTION 
Adult Male: Front part of head white; crown and posterior part of cheeks, throat and neck, very 
dark brown to black. Behind the eyes a very beautiful metallic-colored patch of green and purple, 
extending back on to the occiput and hind neck. Mantle and scapulars black, the former barred, 
and the latter edged with white. Back black; rump and upper tail-coverts white; tail black. Breast 
barred with black and white; abdomen white. Flanks and under tail-coverts bright rust color. Wing 
with a conspicuous white patch on median and greater coverts. A black band on the greater coverts 
borders the speculum, which is black with a slight iridescence. Tertials long and pointed, black, 
bordered with white edges and iridescent, the inner tertial broadly margined with white on the outer 
web. Under wing-coverts grayish, axillars gray. 
Iris dark brown. Bill bluish to blue; black at the tip and along a line at the base of culmen. Legs 
and feet grayish to blackish. 
Whng 255-275 mm.; bill 35-36; tarsus 40-43. 
Adult Female: Plumage same as in male; soft parts as in male. 
Wing 237-245 mm.; bill 35; tarsus 40. 
Young in First Plumage (before primaries are grown) : At this stage the buff-colored downy patch 
is still present back of the eye, the occiput is black and the forehead gray. The mantle, back and 
scapulars, as well as the rump and tail are a dull brown. The breast begins to show the barring of 
the adult, while the rest of the lower surface is pure white. The flanks are barred white and black 
and lack the rich buff feathers of the adult. 
