Concord, Mass.
1902.
July 13
  Cloudless with light S.W. wind. Warm at midday, morning
and evening cool.
  A few birds such as Pine Warblers, Black-throated Green
Warblers, Tanagers, Song Sparrows, Swamp Sparrows and Vesper 
Sparrows sang freely and well at morning and evening and
at rather frequent intervals through the day. A Black & White
Creeper was also singing strongly at 8 A.M. A little later
I heard a Chestnut-sided Warbler utter the normal spring
song once in full, vigorous tones. A Cat-bird and a
number of Oven-birds were singing at evening all but
one of the Oven birds using the flight song which I
also heard given this morning by a bird which which 
did not rise above the thicket from whence the notes
issued. Veeries sang freely at morning and evening.
Birds still in song.
  At evening I saw fully 200 Red-wings rise in a
sable cloud from the wild rice at Beaver Dam Rapid.
They alighted in a solitary maple where they kept up
a deafening clamor for several minutes, finally flying
back to the wild rice again and apparently settling there for the night.
Red-wings going to roost.
  The Swallows did not go to bed until fully 20
minutes after the Red-wings. I merely heard their 
chattering. Gilbert who saw the flock pass Ball's Hill
thinks that it contained over 200 birds.
Flight of Swallows at evening
  The Long-billed Marsh Wrens were silent during my
last visit to Ball's Hill but two birds were in full
song this evening in the canary grass (Phalaris)  on the 
borders of the Beaver Dam Rapid.
Marsh Wrens
  The Swifts have built a second nest in the cabin
chimney. It contained three eggs to-day.
Swifts nest in chimney
55