COURTSHIP AMONG ANIMALS 



19 



encircles the neck immediately behind the head, and 

 of long tongue-shaped " ears " which surmount the 

 head. These vary greatly, being coloured red, 

 cream, buff, black or white, or with spots and stripes, 

 no two ruffs being alike. 



fiDULTMflLE 

 FIG. 11. BULL BIRD (Chasmorhynchus Nivens). 



The adult male shows the ornamental appendage in inflated 

 condition ; the young male shows it in flaccid condition. 



(From " Darwin and After Darwin," by G. J. Romanes. By permission of Messrs. 

 Longmans, Groen & Co.) 



An extraordinary decoration is that of the Bell- 

 bird (Fig. 11). The female is dusky green in colour; 

 but the male is white, with the exception of a tube 

 three inches long, which rises from the base of the 

 beak and communicates with the palate. Under the 



