248 THE BIRD WATCHER 
tion, the buccal CAV big s displayed by the one sex as 
a charm or attraction before the eyes of the other, 
having been specially coloured in order to render 
it so. A question, however, is raised by this con- 
clusion in regard to which I have, as yet, said nothing, 
but which I will shortly discuss in a separate chapter, 
since I have been unable to compress it into any 
of the foregoing ones. It had occurred to me as 
a result of my general field observations, before these 
particular ones which have only served to emphasise it. 
