CHILIAN PINTAIL 
331 
Color of soft parts the same as in male. 
Wing 212-240 mm.; bill 40; tarsus 40. 
Young in First (Juven.^l) Plum.\ge: Like the female, but the top of the head lacks the rich chest- 
nut color of the adult, and the chin and throat are grayish, with very minute spots. The whole 
under surface is much grayer than in the adult and indistinctly streaked, with no spotting, even on 
the breast. The upper surface is very nearly the same, but the tail-feathers are blunted and the 
long central ones poorly developed. Bill much straighter in profile along the culmen and less 
“dished” than in the adult. 
Young in Down: Darker over whole upper side than the young of the Common Pintail, Anas acuta, 
the color being dark brown to jet black instead of a medium tinge of browm. Lower side almost pure 
white as contrasted with the dirty or grayish white of the Pintail. The body- and face-pattern is 
about the same as in the Pintail as near as can be determined from the small series taken by Mr. 
J. L. Peters in the Rio Negro Province of Argentina. 
Remarks: Immature specimens at four or six weeks of age are not to be differentiated from the 
northern Pintail at the same stages of growth. 
Peru 
DISTRIBUTION 
The Chilian Pintail is the commonest duck of South America, and it has one of the largest distribu- 
tions. An examination of seasonal dates shows that it is essentially a non-migratory spfecies, except- 
ing at the northern and southern extremities of its range, while in the Andean regions its migration is 
probably vertical rather than north and south. 
In the north its regular range extends in the Andes as far as central Peru, though it is said to occur 
occasionally even in Dutch Guiana (F. P. and A. P. Penard, 1908-10) and perhaps in British Guiana 
(C. B. Dawson, 1916). There are numerous records for the lakes and rivers of the 
Peruvian Andes. The Brewster-Sanford collection (American Museum of Natural 
History) possesses a series of seventeen specimens taken at Junin at an altitude of 12,900 feet in 
March, and some of these birds were evidently breeding. Taczanowski (1886) has also recorded it 
from Junin and Rumucucha, while specimens were taken by Whitely (British Museum) at Tinta, the 
Laguna de Tangasuca and the Laguna de Langui. Von Berlepsch and Stolzmann (1906) have re- 
corded specimens taken in the Province of Puno in December, and others have been taken in the same 
month at Lake Titicaca {circa 11,500 feet) according to Menegaux (1909a). 
In Bolivia this Pintail seems to be confined to the Andean region. Von Boeck (1884) has recorded 
it from Cochabamba, and Menegaux (1910) has listed two specimens taken in June (!) 
on the Rio Pazna which flows into Lake Poopo. 
Paraguay is a country poorly explored ornithologically. The Pintail has been found there, near 
Fortin Donovan in the Chaco by Kerr (1892) and H. von Ihering (1904) says it occurs 
there, but it is probably not a common bird. 
In Brazil the species occurs only in the southeastern parts. Von Pelzeln (1868-71) has recorded it 
from Harare, and H. and R. von Ihering (1907) say that specimens have been taken in gj^^il 
Sao Paulo and Rio Grande do Sul. In the latter Province it ought to be quite common, 
for it is said to be the commonest duck in Uruguay (Aplin, 1894). Barrows (1884) met with it at 
Concepcion in June, and the Berlin Museum has specimens from Montevideo and Uruguay 
Canelones (von Pelzeln, 1868-71). According to Tremoleras (1920) it has also been 
recorded from Rocha. 
Undoubtedly the great center of concentration for this Pintail is the Argentine Republic. In the 
Bolivia 
