CANVAS-BACK DUCK. 159 



guess, since no accurate observations have ever been 

 made on their flight. It is certain that they proceed at 

 great speed, and the novice at canvas-back shooting is 

 very sure to shoot behind them until he has had a great 

 deal of practice. 



The canvas-backs start from their southern home to- 

 ward the north early in March and follow the coast and 

 the interior northward, often reaching northern waters 

 before they are generally open. On the breeding 

 grounds they are practically undisturbed. 



-^$^^<1. 



-r 



