BR USB- TURKE YS. 



439 



depository for the eggs, and trusts to the heat engendered by the process of 

 fermentation for the development of the young. The heap employed for this 

 purpose is collected by the birds during several weeks previous to the period of 

 laying ; it varies in size from two to many cartloads, and in most instances is of a 



AUSTRALIAN BRUSH-TUKKEYS (J liat. size). 



pyramidal form. . . The materials composing these mounds are accumulated by 

 the bird grasping a quantity in its foot and throwing it backwards to a common 

 centre, the surface of the ground for a considerable distance being so completely 

 scratched over that scarcely a leaf or a blade of grass is left. The eggs are 



