Concord, Mass.
1907
May-June
(2)
  On March 16th Raymond Emerson saw ten Tree Swallows
perched on the ridge pole of a boat house near Ball's Hill.
Three or five flying about over the river meadows when
I came to the cabin on April 1 and I saw them daily
there up to the 9th when they were all driven off for
a few days by a heavy snow storms. Early in May two
pairs took possession of bird houses on our farm and
there was two more pairs established on the Richie places.
They all built nests which were nearly or quite finished
by the 19th when I saw two of the birds copulating.
Shortly after this they were driven to the river meadows
for several days by a spell of cold, stormy weather. This
I fear caused some loss among them for only two pairs
returned to the boxes. One of them disappeared a little
later. The other pair raised a brood of young - on the
Ritchie place.
White-bellied Swallows
  On the morning of May 18, just as day was breaking,
I heard, for the first time in many years, the song of a
Tree Swallow repeated at short intervals for several minutes
but ceasing before it was broad daylight. I noted it
thus: - sit, clear, sit, clear, sit clear, clear, sit, clear,
clear, clear. It is a monotonous unmusical song
but very interesting because of its peculiarly. The notes were
widely spaced & deliberately & distinctly enunciated.
Later in the month I heard this song several times
at day break and over in the evening twilight.
Song-of-the Tree Swallows
  On July 3 and again on the 10th I saw a
Tree Swallow flying about near one farm house accompanied
by three young which she fed on wing the old and
young bird coming together and mounting straight
upward bill to bill for the moment during which the