THE ROLLER CANARY 251 



tinct, and continue each different roll for a long time. 

 It is this capability to sustain the roll which distinguishes 

 a first-class performer from a second or third-rater. 

 Birds which change their note quickly, are harsh in their 

 song, or which make frequent stops, even if only for a 

 second are not to be classed as good singers. Wliat is 

 wanted is a bird that starts out clearly and goes right 

 through his song with the different notes in proper sequence. 



