The Cockatoos. Ill 



Blue-eyed Cockatoo (Cacatua ophthalmica). 



There are only sexed females in the Museum series, but the 

 differences will pix>bably be such as in the preceding species. 



Rose-crested Cockatoo {Cacatua moluccensis). 



Only males are sexed in the Museum, but it is probable that the 

 usual differences exist. 



Bare-eyed Cockatoo (Cacatua gymnopsis). 



Only a female is sexed, but the probable male has a narrower and 

 less arched beak, with a longer and more slender terminal hook. 



Blood-stained Cockatoo (Cacatua sanguined). 



The female, as usual, has a shorter and broader beak, with a more 

 heavily-formed terminal hook. It is probable that the cut in the 

 Zoological Society's List is taken from a female. 



Goffin's Cockatoo (Cacatua goffini). 



The female is smaller than the male, and the Museum sexed 

 example has the head, throat, and breast white, the crest slightly 

 yellowish, the beak longer, with more slender terminal hook. 

 Whether the colour differences in the Museum example are constant 

 or not I cannot say, and Count Salvadori does not even mention 

 them. As they are rather striking in a group in which the sexes 

 usually closely resemble one another in plumage, this omission seems 

 somewhat strange. 



Ducorps' Cockatoo (Cacatua ducorpsi). 



This species seems nearly related to Goffin's Cockatoo. The only 

 sexed male in the Museum has the beak rather badly broken, so 

 that it is difficult to compare it with that of the female. It is, 

 however, evidently broader and altogether larger. 



Red-vented Cockatoo (Cacatua hcematuropygia) . 



In the male the beak, viewed from above, is seen to be broader 

 to beyond the middle than that of the female, with a longer and 

 narrower terminal hook. 



Roseate Cockatoo (Cacatua roseicapilla). 



The Museum series of this abundant species is unfortunately a 

 very poor one, and only the male is sexed, but the differences are 

 probably similar to those in the preceding species. 



Slender-billed Cockatoo (Licmetis nasica). 



In the male the beak is noticeably longer, narrower, and generally 

 more slender than that of the female. 



