Cambridge, Mass.
1909.
May 25
  Sunny for the most part but with the sky
half-filled at times by dark masses of clouds. Very
cool with high N. wind. There must have been a 
sudden drop in the temperature last night for yesterday
was warm and at 10 P.M. the air was soft & mild.
  The first really heavy bird flights of the month
occurred last night, started, no doubt, by the warm wave
of yesterday which succeeded a prolonged spell of very
cool weather. When I stepped out on our back piazza
at eight o'clock this morning I was greeted by the
songs of a great number & variety of birds coming from
various parts of the garden. Within less than a
minute I heard a Bay-breast, Black-poll, Chestnut sided &
Black & Yellow Warbler, a Wilson's Black-cap, a Water Thrush
and a Lincoln's Finch. Others were added to the list in
the course of the next hour or two. Including our locally
resident birds such as Robins, Chippies, etc, I noted just
30 species in the Garden during the forenoon. J.H. Baker
whom I found there when I went out reported
a large flock of migrants of various kinds which he had
found earlier in the morning in the Maple Swamp near
the turnpike road and a smaller flock, including what he
took to be a male Tennessee Warbler (he described the plumage &
song correctly) in an apple orchard on Hudson Avenue.
Quite evidently, then, there must have been a rather general
influx into the Cambridge Region although the flock in
our Garden seemed to be the only one in this immediate
neighborhood for I visited the Dr. Wyman place this forenoon
without finding a single native bird while I noted only a
Blue Jay while walking up Brattle to Fayerweather St. a little later.
Baker saw in our Garden what he thinks was a Mourning Warbler but I 
failed to find it.
Northbound migrants swarming in our Garden
Bay breast Warbler
Larger flock of migrants in Maple Swamp
Tennessee (?) Warbler
Mourning Warbler