THE TRAVELS OF BIRDS 



under way, some are waiting the call to "fall in," 

 but all in their proper season will take up the 

 march and at their due date reach their destina- 

 tion. 



THE ADVANCE GUARD. 



Migrating male Red-winged Blackbirds. They are among the 

 first birds to come in the spring, the males arriving before the 

 females. 



Let us take a position, say near New York 

 City, and watch this vast army pass. If we were 

 in Washington we should see it about a week 

 earlier ; while in Boston it would be a week later. 



52 



