Concord, Mass.
1893
Sept. 9
(No 3)
  Barn Swallows accompanied or appeared with, the
Swifts this evening although not one had been seen during
the day. There were not many, perhaps a dozen in all.
They flew about in small clusters scattering occasionally
& feeding a little but as a rule keeping close together
& rather high in air. They acted as if they were
looking for a roosting place.
[margin]Barn Swallows
migrating[/margin]
  [delete]We started[/delete]There was also an unusually heavy
and well-marked migration of Night Hawks beginning
at about 5 P.M. and lasting until nearly dark.
They all came from the north east in ones, twos, and
threes and went off towards the south-west, a course
they invariably follow here. While crossing the meadows
they descended and fed for a few minutes by flying
about in irregular lines but some of them tarried
long. Indeed I have rarely seen them appear to be
in greater haste to push on southward. We counted 
18 birds in all.
[margin]Night Hawks
Migrating[/margin]
  As it was getting dark this evening I walked with
Mr. Hubbard to Dakin's Brook & back. Before the light
had faded in the W. 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 they sky was thronged with them. No doubt
they were the birds which came last night and
spent the day in the region about and to the northward
of Concord. The flight seemed to slacken at about 8.30
P.M. The night was clear, still & warm.
[margin]Heavy night
flight of
Warblers[/margin]