Concord, Mass.
1908
March 14
to
June 1 
  The spring flight of north-bound migrants was meagre
and disappointing as a whole. In late March and early April
I saw fair numbers of Fox Sparrows, Juncos and Yellow rump
Warblers and exceptionally large numbers of Yellow Red-poll Warblers
but almost no Tree Sparrows. The flight of migratory Swallows was
much below the average although White bellies were rather numerous
for a time. Rusty Blackbirds appeared in good numbers at first
but towards the latter part of their stay were unusually scarce.
Although I spent the entire spring in their favorite haunts I 
did not once hear them sing freely and generally. Nor
was there much Robin song before May. This no doubt was
because of the exceptionally cold windy weather which
prevailed through most of April, when there was more than
one day brilliantly clear yet so frigid and tempestuous
that I did not hear a single bird song from daybreak to
dusk.
Spring Migration
  In May we had only one really noticeable "bird wave". This
came and passed on the 11th 12th and 13th three very warm
days of which the first two were spent by me at Cambridge,
where our garden, on the 12th, was literally alive with Warblers
of various kinds. What happened at Concord during these two days
I do not know but when I returned there on the morning of the
second day (the 12th) I found only a few birds at Ball's Hill.
There were a good many at the farm the next morning, however.
After that there was a general and really remarkable dearth of
north bound migrants. Of some species ordinarily abundant, such as
the Black poll Warbler and the Water Thrush, I noted only two or
three individuals each, while others which I am accustomed to look for
with reasonable confidence of success, as the Bay-breast Warbler, the Cape May,
the Tennessee, Wilson's Black cap, Lincoln's Sparrow & White Crown Sparrow
I did not meet with at all.