A PAIR MADE A CURIOUS MISTAKE II 
to a practised eye the somewhat smaller size 
of the female and its more sober hues are at 
once evident. Only the cock exhibits the 
very bright red breast, and this is most 
brilliant at nesting time. Any one who has 
kept sticklebacks in an aquarium will have 
noticed the similarity of colour between 
the body of the male fish (especially in the 
spring at the breeding season) and that of 
the breast of the robin—indeed he is called 
the ‘robin stickleback.’ To keep a cock 
robin in a cage is sheer cruelty, as he will 
surely die. 
