Concord, Mass.
1901.
July 13
(No 3)
  I have not heard a Yellow-throated Vireo since June 30th
until to-day when one sang through nearly the whole
forenoon in the oaks near the cabin.
  As I was strolling at evening past Bensen's landing I
heard, very near me, a dozen or more sharp, hurried, tripping
notes so exactly like those which form the usual prelude
to the flight song of the Oven birds that I had no
doubt at the moment that they were uttered by a
bird of the species but greatly to my surprise they
were followed, without the slightest pause or break, by
the warbling, "midsummer" song of the Black and White
Creeper. I felt very sure at the time that the
notes which preceeded this song were given while the 
bird was on wing and the song itself after he had
alighted in the trees (a cluster of tall gray birches on the
edge of the meadow) but I did not actually see
him either during or after his unusual performance.
There can be little doubt, I think, that what I
heard on this occasion was a true flight song.
  Last evening I saw for the first time this summer
Bobolinks and Redwings flying up river past the cabin
at evening apparently on their way to some roost. There
was a similar flight this evening. On each occasion
only two or three small flocks appeared. I think
there were a few Cow-birds with the Red-wing.
  At about eight o'clock this morning a flock of
six Black Ducks appeared over the meadow opposite
the cabin flying low and finally dropping into the
grass not far from our boat canal. At evening, as I
was strolling through Pine Park, two more passed nearly over me.
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