Concord, Mass.
Ball's Hill.
1900.
August 17
  Clear with several light dashes of rain & a heavy
thunder shower passing to the southward early in the
afternoon. Evening calm & brilliantly clear.
  Spent the entire day near the cabin where I
saw only a few common birds such as Black & White Creepers,
Red-eyes etc. One of the latter was singing fairly well
at sunrise. At evening I heard full songs from two
different Maryland Yellow-throats.
Singing
  The evening flight of Bobolinks was something unprecedented.
I saw fully 200 in one flock and at least 100 more
in several smaller flocks. All passed the cabin shortly
before sunset heading westward and keeping on out of
sight towards the middle of the Great Meadows, where I
suppose they go to roost in the tall grass. Their
musical pink, pink was a pleasant sound suggestive
of midsummer meadows. There were a few Red wings
flying with most of the flocks.
Evening
flight of
Bobolinks
  Over the Great Meadows at twilight came a
perfect horde of Night Hawks. I counted 17 in sight
at once. They were scattered widely and flying
to & from in every direction crossing & recrossing each
others lines of flight & evidently feeding. As is the
almost invariable rule at this season they were
absolutely silent.
Big Migration
of Night hawks
  My walk this evening was first to the Barrett
meadow, next to Pine Ridge, & back across Ball's Hill
Swamp. The meadows were wreathed in snowy fog
just before the afterglow faded in the west.
Evening
Walk.
  Last evening a Screech Owl wailed across the
river. I heard one calling tonight near the cabin.
Screech Owl.
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