Chap. XIII. 



Vocal Music. 



373 



It seems now well made out that the great throat pouch of 

 the European male bustard (Otis tarda), and of at least four 

 other species, does not, as was formerly supposed, serve to hold 

 water, but is connected with the utterance during the breeding- 



Fig. 40. The Umbrella-bird or Cephalopterus ornatus (male, from Brehm). 



seasou of a peculiar sound resembling /' ock." 43 A crow-like 

 bird inhabiting South America (Cephalopterus ornatus, fig. 40) is 

 called the umbrella-bird, from its immense top-knot, formed of 



43 The following papers have 

 been lately written on this subject : 

 Prof. A. Newton, in the ' Ibis,' 

 1862, p. 107 ; Dr. Cullen, ibid. 1865, 

 p. 145 ; Mr. Flower, in ' Proc. Zool. 

 Soc' 1865, p. 747 ; and Dr. Murie, 

 in ' Proc. Zool. Soc' 1868, p. 471. 



In this latter paper an excellent 

 figure is given of the male Austra- 

 lian Bustard in full display with 

 the sack distended. It is a singular 

 fact that the sack is not developed in 

 all the males of the same species. 



