90 BIRDS OF TIEREA DEL FUEGO 



At Gente Grande lagoons, they are very plentiful. 



At the great lakes m the interior of the Pampas, Azara states 

 he saw "algunas bandadas de muchos centenares; y aunque 

 ninguna vez quise acercarme a tirarles, los encontre muy ariscos." 



Darwin observed Flamingos throughout Patagonia, in 

 Northern Chili, and at the Galapagos Islands, wherever there 

 were lakes of brine. Considerable numbers inhabit a salt lake 

 near the Rio Negro and breed there. He says : — " I saw them 

 wading about in search of food — probably for the worms which 

 burrow in the mud ; and these latter probably feed on infusoria 

 or confervas. Thus we have a little living world within itself, 

 adapted to these island lakes of brine." 



About Lake Colguape and the R. Sengel, Durnford found 

 them common, partially resident, and occurring in greatest 

 numbers in winter. 



ANSERES 



Family ANATID^ 



CYGNU3 NIGRICOLLIS (Gmelin) 



Anas nigriCOUiS, Gmelin, Systema NaturcB, i, p. 502, 1788. 



Cisne de Cabeza negra, Azara, Pdxaros, Paraguay y La Plata, iii, 

 p. 4u4, 1805. 



CygnUS nigriCOUis, Cassin, U. 8. Astron. Exp. ii, p. 200, 1855 ; 

 Abbott, Ibis, p. 159, 1861; Cunningliam, Nat. Hist. Strait of Magellan, 

 p. 266, 1871; Durnford, Ihis, p. 191, 1877, p. 400, 1878; Sclater and 

 Hudson, Argentine Orn., ii, p. 124, pi. xviii, 1889 ; Oustalet, Miss. Sci. 

 Cap Horn, Ois., p. 185, 1891. 



CygnUS melanCOrypllllS, Salvadori, Gat. Birds Brit. Mzcs., xxyii, 

 p. 39, 1895. 



Habitat.— Southern Brazil and Paraguay, to Tierra del Fuego ; the Falkland 

 Islands. 



