Concord, Mass.
1908
April 17
  Brilliantly clear with fresh W. wind. Ther. 14 degrees at 5 A.M. 
April thus far has been a remarkably cold and disagreeable 
month with almost incessant gales of wind from the N.W.
The thermometer has twice fallen to 16 degrees and early this morning
it was 14 degrees. The ground was frozen hard at 8 o'clock.
All the smaller ponds were covered with ice but it was no
thicker than window glass. By now it was comfortably
warm in sunny, sheltered places and the Leopard Frogs
were snoring all over the Great Meadows. As I noted the
other day the Wood Frogs have ceased croaking at the
farm but there were hundreds of them in full cry this
afternoon in the densely shaded pool behind Ball's Hill
which is not as yet wholly free from its winter ice.
A cold, harsh season
Frogs
  Spring birds are coming later and only a few at a
time. There was a mixed flock at Ball's Hill to-day
which included a Ruby-crowned Kinglet, 2 Pine Warblers,
3 Yellow-rumps, 5 Yellow Red polls and two Tree Sparrows.
The last named are the only representatives of their
species that I have seen this spring in Concord.
Spring birds coming late & slowly
  Partridges appear to be rather numerous on the
place this spring. I heard one drumming in the run 
this morning & started another near the spring.
On my way home at evening I flushed three different
birds in Prescott Pines.
Partridges
  During the cold weather which has presided of
late there has been almost no bird song. I heard
a Robin singing well last evening but they were silent
to-day as were the Song Sparrows, also.