204 
ANAS SIBILATRIX 
Young in Down: The young of all three species of Widgeon vary a good deal in color and that of 
this species is very close indeed to that of the European Widgeon. Sometimes it is even more rusty 
red in color on the head but at other times the head color is about the same. The body spots are 
rather prominent, especially the rump spots. It is easily told from the young of the American 
Widgeon by the rusty-pink color of the head. 
Note: There is no return to a simpler (eclipse) plumage in summer. 
DISTRIBUTION 
Paraguay 
Brazil 
Uruguay 
Argentina 
The Chiloe Widgeon, which is found throughout the southern part of South America, seems to be 
essentially a non-migratory species, though in the northernmost parts of its range it appears to be a 
winter bird only. It is not a common duck north of the latitude of Buenos Aires, but 
is said to have occurred in Paraguay (H. and R. von Ihering, 1907) and in the Argen- 
tine as far north as Tucuman (Dinelli, Dabbene, 1910). It has occurred in the 
extreme southeastern part of Brazil, near Rio Grande (H. and R. von Ihering, 1907) 
and has been taken in Uruguay in the Cerro Largo and Canelones Provinces (Tremol- 
eras, 1920). From northern Argentina it has been recorded not only from Tucuman, 
but also from Cordoba (Schultz, jfde Dabbene, 1910) and Mendoza (H. Burmeister, 1860) where it is 
said to be common (Reed, 1916). Farther east and south it is found to be a very common bird in the 
Province of Buenos Aires during the winter (Hartert and Venturi, 1909; de Beauquesne, 1911; H. 
Burmeister, 1872; Withington, 1888), some remaining to breed in the southern parts of the Province 
(Durnford, 1878; E. Gibson, 1920). Throughout Patagonia it is a plentiful species, especially in the 
eastern parts. Mr. J. L. Peters, collecting for me, found it also fairly common in western Patagonia. 
Durnford (1878) found it breeding in great numbers at the mouth of the Sengelen, in Chubut, and 
Doering (1881) recorded them on the Rio Colorado and Rio Negro. Oustalet (1901) says they are 
resident on the Rio Gallegos in southern Patagonia, but Tierra del Fuego they seem to visit only 
during the breeding season. Crawshay (1907) found them quite common on that island at San 
Sebastian and in Useless Bay, while Blaauw (1916a) came across them at Estancia Sarita. There 
seem to be no records for southern Tierra del Fuego. 
Falkland Abbott (1861) and more recently Beck (MS.) found the Chiloe Widgeon on East 
Islands Falkland where the species breeds, but is very scarce. 
In Chile this duck is found north to about the same latitude as in Argentina. Cunningham (1871) 
took a few in the breeding season at Gregory Bay (Straits of Magellan) and throughout southern 
Chile it is a common bird, especially about Chiloe (Lane, 1897; Schalow, 1898; Quijada, 
1910). North of Valdivia it seems to be a rarer bird (Lane, 1897), but there are records 
for Concepcion (Schalow, 1898), Santiago (British Museum; Blaauw, 1916a), Colchagua (Lataste, 
1895) and even Coquimbo (R. B. Sharpe, 1881). These more northern records are mostly winter 
occurrences. 
Chile 
GENERAL HABITS 
Haunts. From the meager field notes available for the study of this bird, there 
seems to be little difference between it and its relatives of North America and the 
Old World. It appears to be essentially a fresh-water species, frequenting the 
large open lagoons rather than small pools or streams (Durnford, 1878) and in any 
case preferring open water to rushy swamp localities (E. Gibson, 1920). Mr. J. L. 
Peters (MS.) found it usually on the arroyos and lagoons of the prairies in western 
