Ajaia ajaja juv. (Roseate Spoonbill, young) 



36 III. 501, 505-6 Chloephaga melanoptera (Andean Goose), C. rubidiceps (Falk- 



land Island Goose) : C. poliocephala (Ashy-headed Goose). In this 

 fine plate Mr. Gronvold has depicted three out of six species of this 

 fine genus of Geese, all which occur at the Straits of Magellan, 

 4 being found in the Falkland Islands, two migrating north to 

 Argentina in winter, and one, the Andean Goose, inhabiting the high 

 Andes from the Straits of Magellan to Chile, Peru and Bolivia, 

 descending to the plains in winter. Two species of Swan, the 

 Black-necked and the Coscoroba occur throughout the southern half 

 of S. America, and the Anatidx are further represented by 43 species 

 including 'I'eal, Pintails, Shovelers, Wigeon, Pochards, Lake Ducks, 

 Spurwinged Ducks, and Merganser. 



37 II. 507 Dendrocygna viduata (White-faced Tree-Duck) The Tree-Ducks, 



three in number, are widely distributed over S. America, the present 

 species being found southward to Argentina. Hudson says it utters 

 three long clear whistling notes. The common " Pato silva '' or 

 Whistling Duck of Argentina is however the Fulvous Tree-Duck 

 (Dendrocygua fulva). 



38 V. 515 Mareca Sibilatrix (Chiloe Wigeon). This species says Hudson, is 



most abundant on the pampas of Buenos Ayres and Argentina ; it is 

 resident and usually seen in small flocks of 12 to 20, but sometimes 

 as many as 100 to 200. 



