Secretary's Report, 1955 



Plate 5 



Eight species of hornbills on exhibition in the National Zoological l^aik siuiuliancuush"; 

 1, Black-and-white hornbill {Bycanistes subcylindricus); 2, Malayan hornbill {Aceros 

 undulatus); 3, wreathed hornbill {Aceros plicatus); 4, Philippine hornbill {Ruceros hydro- 

 corax); 5, Malabar hornbill {Anthracoceros malabaricus); 6, concave-casqucd hornbill {Buceros 

 bicornis); 7, black-and-white casqued hornbill {Anthracoceros coronatus); 8, Abyssinian 

 ground hornbill {Bucorvus abyssinicus). (Photographs by Ernest P. Walker.) 



