1903.
April 11
  Clear with strong N.W. wind. Cooler than yesterday.
  Spent most of day in Birch Field digging small white pines.
There seemed to be a great many birds about but they did not 
sing nearly so fully as they did yesterday. The Bluebirds were
an exception to this rule. We heard one at the farm in the
early morning and there were two mobs warbling in Birch Field
through the forenoon. There was also a Field Sparrow in 
this "field" and a Grass Finch in Green Field, both in full song
at about 9 A.M. I heard a Yellow Palm Warbler singing
and soon afterwards saw the bird among some gray birches.
Its song was not unlike that of a Chippy but more rapid
and spirited although equally unmusical.
  The Cooper's Hawks were comparatively silent to-day
but I heard them occasionally and saw them both more 
than one flying with or from their favorite group of large
white pines. This is evidently merely their resting place at present.
When they start on a hunting excursion they fly straight away
to a considerable distance usually towards the nest. I occasionally 
see one perched on a tree in the woods just across the field
south of the farm house but I do not think that they
look for prey much nearer their trysting place than this. When
they were cackling in their pines yesterday Partridges were
drumming in their direction not far off.
  At evening a Carolina Dove, the first I have noted this spring, 
passed low over the cow pasture & then over the elms about
the house flying very swiftly & making the usual whistle
of wings. This was interrupted, not continuous.
  The Hylas were comparatively silent this evening. I have
heard no Wood Frogs since March.