THE MIGRATION OF BIRDS 



IN WINTER 



HERE is nothing 

 in the animal 

 creation which 

 has excited more wonder 

 and speculation in man- 

 kind than that mysterious 

 going and coming of birds, 

 called migration. For ages 

 past it has been going 

 on; Aristotle quoted, ".Qne 

 swallow does not make a 

 summer, " and Homer com- 

 pared the noisy march of 

 the Trojons to the clamor- 

 ous flight of a flock of 

 cranes migrating south- 

 ward. 



That young birds are sud- 

 denly seized with an uncon- 

 trollable impulse to start 

 for warmer regions, is some- 

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