192 The Migration of Birds 



bird migration. As you study the subject from year 

 to year, and carefully compare your notes, you will 

 find the movement a very constant and regular one, 

 and, as time goes on, your interest in it will increase 

 rather than diminish, and you will find yourself 

 wondering why it is that each spring you greet the 

 bluebird and the oriole wi h a little deeper feeling. 



