OBSERVATIONS AT NEW YORK ZOOLOGICAL PARK 145 



i 



■u 



ir 



» 



woo 



There was a non-legato, bounding effect in the production 

 of these tones indicating a large reserve of vocal power. The 

 following phrases suggested the rumblings of distant thunder; 



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¥■ 



m 



PP' 



00 woo — woo - - woo - - woo - - woo - - woo - woo - - woo 



pp 



^ 



>^- IK 



285 



oo - - woo - - woo 00 — woo - woo 00 — woo — woo 



There appeared, as underscored in the latter part of the 

 first measure below, the downward-moving interval that will 

 presently be seen to be most characteristic of his call: 



i 



1^ 



^^— t Tf^ -^ 



p 



oo — woo - - woo - - woo 00 - - woo woo - woo - woo 



li 



ff 



3 



286 



00 - - woo - - woo 



