INTEODTJCTIOH'. 



117 



feed on insects, and go in small flocks, which are constantly 

 in motion, chattering and piping as they go. They are found 

 in Africa, India, and Australia. 



A much less extensive gronp is that of the Bulbuls, and the 

 Madras Bulbul (Pycnonotus hmmorrJious) may serve as an ex- 

 ample of them. They are Old- World Birds, and are very destruc- 

 tive to fruit. There are about one hundred and eighty species 



Fi". 126. 





The Madras Bulbul {Pi/cnonotus 



in this family-group, and they are peculiar to the Indian and 

 African regions. 



The Barred Woodhewer (Dendrocolaptes radiolatus) may be 

 taken as the type of a large family-group of exclusively Tropical 

 American Birds, numbering some two hundred and seventy-two 



