102 



How to Sex Cage Birds. 



Tn order to illustrate to some extent the different character of 

 the bill in the sexes, I have sketched the sexes of one of the smaller 

 species (Selenidera maculirostris) in outline, but in some of the 

 largest imported species of Rhamphastos the differences are consider- 

 ably more marked. 



outlines of hgaus of male and female of Selenidera maeulirostris to 



J 1,1.1 STKATK THE SEXUAL DIFFERENCES IN THE BEAK8 OF TOUCANS. 



Toucans ( Rhamphastidce) . 

 Toco Toucan (Rhamphastos toco). 



In fully adult specimens the bill of the male is at least one inch 

 longer than that of the female and a trine broader at base. As with 

 most of the Toucans, the sexes do not differ appreciably in plumage. 



Sulphur-breasted Toucan (Rhamphastos carinatus). 



The female is much smaller than the male, and has an altogether 

 shorter and more abruptly terminated bill. 



