CONSIDERATION OF BRITISH BIRDS 111 



vantage, in that young would be constantly 

 protected, as in the Gannet. 



Although both the males and females of 

 these birds are conspicuously coloured, the 

 males are usually more conspicuous. This 

 would make the males more powerful attrac- 

 ting agents than females. Other methods 

 are of course also utilised. 



There is evidence that some of these birds present 

 warning coloration ; for instance, powerful birds (Swan, 

 Cormorant, &c.), and ill-flavoured birds (Petrels and 

 Kingfisher). 



DIVISION III 



Comprises birds having purposely con- 

 spicuous or attracting coloration confined 

 to the male. The vast majority of these birds 

 (Table VII) make open nests, a habit that 

 possibly causes the female to be cryptically 

 coloured. Thus the male only has attractive 

 coloration for the purpose of protecting the 

 young. Arising in this way, this coloration 

 is also used during the breeding season, for 

 the protection of the female. 



In the analidae, the males usually take no 

 part in the bringing up of the young, and yet 

 the males are very conspicuously coloured 

 during the breeding season ; moreover, directly 



