124 How to Sex Cage Birds. 



Maximilian's Parrot (Pionus tnaximiliani). 



In fully adult males the beak is much larger, though rather more 

 slender than that of the females ; but in young birds (as might have 

 been expected) the beak is almost as broad, excepting towards the 

 tip, as that of the female. 



White-headed Parrot (Pionus senilis). 



In this species the beak of the male is larger, longer, and less 

 arched than that of the female, the terminal hook is also longer, and 

 the entire bird slightly larger. 



Bronze-winged Parrot (Pionus chalcopterus). 



If one compares fully adult birds, the male of this species has a 

 far more slender beak, with much longer terminal hook, than the 

 female; younger and therefore smaller birds are much more alike, 

 the beaks of the males being then of a much more feminine type. 



Dusky Parrot (Pionus fuscus). 



The male is larger than the female. It has a larger and more 

 slender beak, with a slightly longer terminal hook. 



Hawk-headed Caique (Deroptyus accipitrinus). 



The male is larger than the female, its beak is altogether heavier. 

 Count Salvador! says (Catalogue of Birds, vol. xx. p. 337): "Female. 

 — Like the male, but apparently with no red spots at the bases of 

 the inner webs of the lateral tail-feathers." 



Red-capped Parrot (Pionopsittacus pileatus). 



In the male the beak is rather larger and narrower than in the 

 female. Count Salvadori says (Catalogue of Birds, vol. xx. p. 341) : 

 " Female. — Like the male, but the forehead tinged with blue, no red 

 whatever on the pileuni ; crown and occiput green with an olive 

 tinge." There is one example sexed as a female which is coloured 

 like the males, so we must conclude that the Count decided this 

 sexing to be incorrect. 



Black-headed Caique (Caica melanocephala). 



When viewed from above the beak of the male is seen to be 

 broader and a trifle shorter than that of the female. 



White-bellied Caique (Caica leucogaster). 



Only a male is sexed, and Count Salvadori does not mention the 

 female. It is probable that the sexes differ as in the preceding 

 species. 



