The Making of Species 



FACING PAGE 



BOURU FRIAR-BIRD . . . . .222 



Like most of the group to which it belongs, this honey-eater 

 (Tropidorhynchus bouruensis] is a soberly coloured bird, but is 

 noisy, active, and aggressive. 



By permission of M essrs Hutchinson <& Co* 



BOURU ORIOLE . . . . .222 



This " mimicking" oriole (Oriolus boiiruensis] is of the same 

 tone of colour as its supposed model the Friar-bird of the same 

 island. 



By permission of Messrs Hutchinson dr 3 Co. 



KING-CROW OR DRONGO . . . .232 



This very conspicuous black bird (Dicrurus ater), ranging 

 from Africa to China, is a striking feature of the landscape 

 wherever it occurs. 



By permission of Messrs Hutchinson &> Co. 



2 3 2 



DRONGO-CUCKOO ..... 



The fork of the tail in this bird is unique among cuckoos, but 

 is nevertheless much less developed than in the supposed model, 

 and may be an adaptation for evolutions in flight, as such tails 

 usually appear to be. 



By permission of Messrs Hutchinson &* Co. 



SHIKRA HAWK . . 236 



The upper surface of the tail, not shown in this drawing, 

 exactly corresponds with that of the cuckoo "mimic." 



By permission of Messrs Hutchinson &* Co. 



HAWK-CUCKOO . . . . .236 



This species (Hierococcyx varh(s) is commonly known in India 

 as the " Brain-fever bird." 



By permission of Messrs Hutchinson &* Co 



xviii 



