200 ORNAMENTAL WATERFOWL. 
mandible. The Rosy-bill is a native of South America, being 
brought from Chili and Patagonia. The beautiful waxy-looking 
rose-coloured bill renders it a striking object on the water, and 
it has the advantage of not undergoing the variation of plumage 
common to so many species, which, like the Mandarin and 
Carolina, present a somewhat shabby appearance during the 
summer months, whereas this beautiful drake with the glossy 
black head and neck, shot with pink and peacock blue, and the 
startlingly rose-coloured waxy bill, remains in full dress for the 
greater part of the year, forming a great contrast to his mate, 
quietly clad in chestnut and fawn, with her bill of a dull slate 
colour. 
A short account of this bird communicated by various 
writers will be found in the P.Z.S. 1876. It is said to be 
common on the Parana, and Mr. Hudson obtained specimens 
near Buenos Ayres. There is very little on record respecting 
the natural history of this species, though it is mentioned 
casually in most catalogues of collections, and by German and 
Spanish authors. Myr. Sclater (P.Z.S. 1868) states “that this 
bird has a large bulbous expansion in the windpipe.” “ This,” 
says Professor Garrod “I have found in all the male specimens 
I have examined. There is also some dilatation of the 
consolidated rings which go to form the lower portion of the 
trachea : this is to be observed on both the right and left sides, 
the box being connected with the latter only. In the female 
no box is developed. The trachea narrows slightly above the 
syringeal box.” From my own observation of this species I am 
inclined to think that it is liable to some bronchial affection 
which impedes its respiration, seeming to suffer acutely when 
driven, and to gasp and wheeze in a remarkable degree when 
alarmed. Professor Garrod in his paper “On the trachea of 
certain Ducks,” P.Z.S. 1875 (from which I have already quoted), 
points out that the windpipe of this bird is constructed on the 
