WESTERN AUSTRALIA 219 



different types of the coastal country. The latter 

 country is divided into : 



1. Limestone hills with dwarf scrub. 



2. Sandy moist land with red flowering gums, tea 



tree, and grass trees. 



3. Granite and ironstone ranges carrying the jarrah 



trees. 



Each class of country in the south-west area 

 bears its own species, and its own races of them, 

 adjacent. 



THE BLACK COCKATOOS 



The cockatoos that are black have recognition 

 marks of red, or white or yellow. The only one 

 with white keeps to south-west Australia, and the 

 one with yellow to south-east Australia. The bird 

 with red in its plumage, map 100, c, connects a and 

 b, and is found in Central Australia. The Tas- 

 manian bird is an insular race of d. The Great- 

 billed Cockatoo is found only in northern Australia, 

 from west to east. 



The female appears to do most of the nesting, 

 while it is expected of the male that he will feed 

 her. She leaves the hollow tree in which are placed 

 the eggs, and settling on the branch welcomes her 

 mate. She is then fed, and immediately preens her 

 feathers. Ten minutes later she re-enters the nest, 

 tail first, and a few weeks later the young have to 

 climb upward, six feet, in many cases. There are 

 two young, and as one is born about a week later 

 than the other, it rarely is strong enough to do the 



