Concord, Mass.
1909
March 31
  March "goes out like a lion" this time - with
a roaring N. W. wind, less harsh than that of yesterday,
however. Sky absolutely cloudless from morning to night
and an exquisite tender blue. Air clear as crystal. Altogether
a rarely beautiful day and by no means an uncomfortable
one. The thermometer registered 32 degrees as the lowest temperature 
last night and 53 degrees as the highest today.
Weather
  Noted for first time this year: - Phoebe - one singing
near the cabin at Ball's Hill. Wood Frogs - about half
a dozen croaking at 4 P.M. in the swampy pool at
the foot of the hill below our orchard, where I usually
hear them earlier than elsewhere and nearly always
about this same time of day - when the westering sun
strikes full upon the little pond.
First Phoebe
First Wood Frogs
  Today perhaps marked the flood tide of the
northward migration of Fox Sparrows, Juncos and
Song Sparrows. There were no less than 20 birds of
the first named species at our seed bed this afternoon
but I found none elsewhere on the place nor at Ball's
Hill. Of Juncos we had scarce half a dozen about
the house but I met with an immense flock in the
fields near Bensen's, fully 100 I should say.
  Song Sparrows were singing everywhere especially
near the river and in Pine Park. I must have seen
& heard twenty or more. It is true that the estimated
numbers (counted in the case of the Fox Sparrows) are not
large for any of these three birds but I have an idea
that they may not be exceeded in my experience here 
this spring for the season is of a kind unfavorable for big flights
of the earlier species.
Rather heavy migrations of Song Sparrows, Fox Sparrows & Juncos