86 HOW TO IDENTIFY NEW ZEALAND BIRDS 
Anseriformes. 
DUCKS 
17 in. Black Teal or Scaup (Fuligula novaeseelandiae). 
Small size and greenish black colouring, speculum white. 
17 in. Grey Teal (Nettion or Virago castanea). Seldom 
seen in South Island. Not common. Greyish brown colour- 
ing, speculum black tipped white. 
17 in. Brown Duck (Elasmonetta chlorotis). Sometimes 
known as Red Teal. Peculiar piping note. Greyish brown, 
varied rufous. Speculum greenish black. 
19 in. White-winged Duck (Nyroca australis). Dark chest- 
nut. Distinguished from Brown Duck by larger size and 
conspicuous bar on wing when open, when shut triangular 
spot. Rare. 
20 in. Grey Duck (Anas superciliosa). Greyish brown 
colour. Differs from Grey Teal by large size, and speculum 
green margined black. 
20 in. Shoveller (Spatula rynchotis). Sometimes known as 
Spoonbill Duck. White on neck and breast, also flat broad 
bill, especially at tip. 
20.5 in. Merganser (Promergus australis). Dark grey, 
markings of grey and white on breast. Rare. The only New 
Zealand sea duck. Found only in Auckland Island. 
22 in. Blue Duck (Hymenolaimus malacorhynchus). Blue 
colouring, peculiar whistle ‘‘whio, whio’’; not common. 
Found in mountain streams where the bush is thickish. 
Sometimes called Mountain Duck. 
24 in. Mallard (Anas boscas). Purple speculum. White 
in tail conspicuous when flying. 
24 in. Paradise Duck (Casarca variegata). Conspicuous 
bright colouring. Large size. Cry of ‘‘Where where.’’ 
40 in. Black Swan (Chenopis atrata). Distinguished from 
Goose by dark colouring,» rose colour, and long neck. 
43 in. Male, 41 in. Female. Canadian Goose (Branta 
canadensis). Grey, brown colouring; cry of ‘‘ Hawk-hawk- 
a-hawk.’’ 
