1909.
April 6 
(No 2)
Concord, Mass.
  Three White-bellied Swallows were dashing about in the
early forenoon and late afternoon, visiting all my boxes both
at the farm & on the Ritchie place, alighting at the entrance
holes & peeping in, twittering and calling in their glad,
winsome way, reminding me of the days of my youth
when they were so numerous in Cambridge.
Tree Swallows
  The pair of Bluebirds that have taken possession of
the box in the apple tree across the road from which
I took the clutch (?) of 11 eggs last week were building
this morning. I saw the female fly to the box & enter it with
a bill full of dry grass.
Bluebirds building nest
  Saw a very dark colored Shrike in Bensen's pasture.
It alighted on the topmost spray of an isolated white pine.
Shrike
  Wood Frogs croaking everywhere all day long & tonight.
I heard & saw them in the flooded river meadows, even. On
examining a number in sunlight, at short range, through my glass, I
was surprised to find that their coloring was wholly unlike that in
summer & autumn. It looked almost black with a greenish tinge.
The black head stripe looked scarce darker than the entire back.
Wood Frogs
Their dark coloring at this season