Chaetura uelasi ca. 
Concord, 
1895. 
Aug. 5. 
Mass. Flying at night. 
I was restless during the night and awoke many times. At 
about 2 A.M. (I did not look at my watch) I was surprised to 
hear Chimney Swifts twittering outside the window. There 
seemed to be a good many of them and the sound of their voices 
indicated that they first circled about the house several 
times and then went off towards the South. .When I first heard 
the twittering there were also several birds making their pe- 
culiar rumbling in the chimney but this soon ceased and was 
not again repeated. The night was dark and still at the time 
with rain falling gently and steadily. My impression is that 
these Swifts were starting on migration and that several birds 
roosting in our chimney emerged and joined the larger throng. 
