CALLS AND MUSIC 



21 



whicli it uses verj frequently, and has the habit alse 

 of " squeaking out " as it leaps into the water when 



Fig. 13.— The bullfrog (Eana catesbiana). 



disturbed. The spadefoot toad croaks fearfully in a 

 deep rasp — as if his vocal aj^paratus needed oiling; 

 and the voice of the 

 bullfrog (Fig. 13)— 

 especially when quiet 

 and reflective in the 

 later season — is de- 

 scribed as " jug-er- 

 rum," with a deep 

 really musical ring at 

 times. Again it may 

 be a series of very ex- 

 plosive " cliee-ungs " 



very far apart ; but Fig. 14.— Tree-toad {Hyla versicolor). 



