The Spring Migration of 1901 



It is our desire to record in the future the dates of spring 

 arrivals at as many points as possible in Pennsylvania and New 

 Jersey, and we ask the co-operation of all who are willing to aid. 

 Blanks for keeping the record will be furnished upon application 

 to the Club. For the spring of 1901 we are able to publish five 

 records which are all more or less incomplete. The migration 

 was a peculiar one, as owing to the almost continuous cloudy 

 and rainy weather that prevailed during April and May, the 

 usual well-marked "waves" of warblers were not observed at 

 all at some stations, and the number of migrating birds seemed 

 very much less than usual, doubtless due to a rapid flight after 

 continued hindrance by unfavorable weather. May 10-12 seems 

 to have been the time of the greatest migration. 



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