THE BIRD STUDY BOOK 



years ago the United States Government put into 

 operation a plan for collecting and tabulating infor- 

 mation concerning the dates on which migratory 

 birds reach various points in their journeys. More 

 than two thousand different observers located in 

 various parts of the country have contributed to these 

 records, many of the observers reporting annually 

 through a long series of years. As a result of this 

 carefully gathered material, with the addition of 

 many data collected from other sources, there is now 

 on file in Washington an immense volume of valuable 

 information, much of which, in condensed printed 

 form, is obtainable by the public. This work was in 

 charge of Professor Wells W. Cooke, Biologist, in the 

 Biological Survey of the United States Department 

 of Agriculture until his lamented death in the spring 

 of 1916. Who will take charge of it hereafter is not 

 yet determined; but students may obtain from the 

 director of the Survey migration schedule blanks 

 upon application, and bulletins describing the emi- 

 gration habits of various North American birds. 

 [80] 



