Heavy night flight of Warislers. 



Concord, Ilass. 



1893. As it was getting darlc this evening I walked with Ivlr. 



Sept. 9. Hubbard to Dakin's Brook and back. Before the light had faded 

 in the west Warblers began lisping overhead and for the next 

 hour it was impossible to listen intently for a full minute 

 without hearing one or more and often several would call in 

 quick succession. Evidently the sky thronged with them. No 

 doubt they were the birds which caiae last night and spent the 

 day in t^ie region about and to the northward of Concord. 

 The flight seemed to slacken at about 8.30 P.M. The night 

 was clear, still and warm. 



