26 Nature threatened 
road sides ; but more than 500 species 
live only on peat, on heaths, amongst 
woods, and in other natural habitats 
(F. Dahl). 
Birds afford a great many articles 
of trade, such as plumes, skins, and 
eggs ; and this circumstance contri- 
butes largely to the fact that some 
species are disappearing, whilst others 
are already extinct. At Nice, in the 
market-hall, 1,318,356 singing birds 
and other small species were exposed 
for public sale during the three months 
Nov. ist 1881 to February ist 1882. 
Humming birds and birds of paradise 
are also diminishing. The South 
African ostrich {Struthio australis) has 
been exterminated in Cape Colony, in 
Caffraria, and in Natal. A kind of 
parrot (Conurus carolinensis), formerly 
extensively known in the United States 
of America, is at present only to be 
found in the most southern districts. 
