CONCORD 
1906 
September 9 
A bird wave of unusual magnitude rolled down from 
the north last night. It is interesting that it should 
have come during the warmest night of a warm, stormless 
week and that the birds should have all pushed on after 
but a single day of rest. That they did this eeems to me 
nearly certain, for the air was evidently filled with them 
from shortly after dark this evening until about 9,30 P, M. 
After that, their chirping became less and less frequent 
and when I went to bed at 11 P. M, it had almost wholly 
ceased, Mr. Forbush, who slept in the open air, tells me 
that he woke at 2 A, M, next morning and listened for 
some time without hearing a single call. The bulk of the 
flight lasted only about two hours, or from 7,30 to 
9.30 P. M. 
During the day, the woods and thickets were alive 
with Warblers, most of which were Black-polls, ‘j^f these, 
there were about 25 at Ball's Hill and not less than fifty 
in Birch Field, In the latter place, H. W. Henshaw and 
I found among the Black-polls one Orange-crowned Warbler, 
a Bay-breast, 3 or 4 Black-throated Creens, and a Red¬ 
start, At Ball's Hill I noted a Nashville Warbler, a 
Connecticut Warbler and b . Redstart. 
The Bay-breast seen in Birch Field was an adult 
male in autumn plumage. It showed traces of the black 
head-markings and a broad conspicuous stripe of chestnut 
along each side. 
