THE MIGRATION OF BIRDS 

 Watching for the annual appearance of the first indi- 

 vidual of each species is most fascinating occupation. 



Note. — Government bulletins on the migration of 

 various North American birds may be obtained free, or 

 at slight cost, by addressing H. IV. Henshaw, Chief 

 Biological Survey, Department of Agriculture, Wash- 

 ington, D. C. 



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