List of Illustrations 



FACING PAGE 



BRAZILIAN TROUPIAL .... 284 



This species (Icterus vulgaris) is that most frequently seen in 

 captivity ; the pattern of colour is found in several other allied 

 forms. 



By permission of Messrs Hutchinson &* Co. 



INDIAN BLACK-HEADED ORIOLE . . . 284 



Several other orioles besides this (O. melanocephahis] have 

 the black head. 



By permission of Messrs Hutchinson &* Co. 



QUEEN WHYDAH ..... 298 



This species (Tetraenura regia) is a typical example of 

 seasonal sexual dimorphism, the male being long-tailed and 

 conspicuously coloured only during the breeding season, and at 

 other times resembling the sparrow-like female. 



By permission of the Foreign Bird Club. 



COURTSHIP OF SKYLARK .... 314 



Illustrating display by a species with no decorative colouring 

 or sex difference. 



XIX 



