THE BIRDS' TIME-TABLE 



WHEN we consider the great distances 

 some birds travel and the dangers they 

 encounter by the way, it is remarkable that they 

 usually arrive on time. 



That the daily trips to and from the roost 

 should be made regularly is not surprising. The 

 birds have only a short way to go, and they leave 

 soon after daybreak and return just before dark. 

 But when, year after year, the Bobolink, the 

 Baltimore Oriole, the midget Humming-bird, 

 many Warblers and other birds arrive from 

 journeys thousands of miles in length on exactly 

 or nearly the same day, we ask how they can 

 possibly be so prompt. 



In order to answer this question we must know 



something about the birds' time-table. Anyone 



who has studied the birds about his home for 



many years can make a time-table giving the 



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