FAM. CACATUIDE 
BY T. SALVADORI 
Characters. Sternum complete. Orbital ring completely ossified, with a 

process bridging the temporal fossa. Nostrils open in a cere not much swollen, 
generally naked, but sometimes feathered. Bill very deep, deeper than long, with the upper 
mandible generally much compressed; hook of the upper mandible nearly perpendicular, except 
in Licmetis, and with a file-like surface underneath. Tarsus short. Head always crested. 
As a rule, only the left carotid present. 
Habits. The habits of the Kakatoes are very similar to those of the other Parrots. 
Range. The Cacatuid@ range over the Australian Region, and also in the Philippines. 
Bibliography. Sclater, Proc. Zool. Soc. Lond. p. 182-189 (1862); Finsch, Die Papageien, Vol. 1, 
p. 256-378; Salvadori, Cat. Birds Brit. Mus. Vol. 20, p. 101-136; Rothschild & Hartert, Novit. 
Zool. Vol. 8, p. 531 (1gor). 
Two subfamilies can be easily distinguished : 
SUBFAM. A. CACATUINA= 
Tail-leathers broad, not pointed. 
This subfamily contains 5 genera. 
