CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 3/3 
Dendrocygna DISCOLOR Sclatcr & Salvin. 
Dendrocygna discolor Scl. & Salv., iS^omencl. Av. Neotr. 1873. pp. 129, 
161; Berlepsch & Hartert, p. 131. 
Native name Guiriri. Abundant. This and the following species, 
Alopochen jubatus, are the most common ducks found on the Orinoco. 
Alopochen jubatus (Spix). 
Anser jubatus Spix, Av. Bras. II. 1825. p. 84. PI. 108. 
Alopochen jubatus Berlepsch & Hartert. p. 131. 
Native name Carrctero. Abundant along the banks of the Orinoco 
and its tributaries. 
Eye seal brown ; bill black reddish at angle of conimisure : feet 
vermilion. 
This is the most abundant species of "Duck" in the Orinoco region. 
Like the Pato real, it is frequently seen in a state of semi-domestication 
about the native houses, but I do not know of its breeding. 
The males at the beginning of the mating season — December and 
January — fight some terrific battles, and where a large flock is assem- 
bled, in some marshy spot near the river, the noise of battle may be 
heard for a long distance. The blows of the wings against one another 
and the constant loud guttural "honking" of the contending birds make a 
deafening racket. The females feed quietly, apparently not taking 
much interest in the fray. 
This species like the Tree Duck (D. discolor) nests in hollow trees. 
Nettion br.<\siliense (Gmelin). 
Anas hrasilieiisis Gm., Syst. Nat. I. 1788. p. 517. 
Nettion brasilicnse Berlepsch & Hartert, p. 131. 
Native name Pato Azulijo. Not common at points visited on the 
Orinoco proper, but abundant about the marshes in the vicinity of Las 
Guacas, San Feliz River, during May, 1907. 
On the Orinoco this species was noted at Bolivar, Altagracia. Cai- 
cara and Quiribana de Caicara. 
LARIDAE— GULLS. TERNS, ETC. 
Phaethus.a. chloropoda (Vieillot). 
Sterna chloropoda Vieillot, N. Diet. d'Hist. Nat. XXXII: 1818: 171 
(Paraguay). 
