CONSPICUOUS COLOUR 41 



movement, form, position, sound, scent, and 

 colour ; and probably in other ways. 



3. It is used for three purposes : A, to 

 signal to friends ; B, to signal to enemies ; 

 and C, rarely, to signal to food. 



4. The signals to enemies are of two kinds : 

 A, to repel them ; B, to attract them. 



