1903.
May 29
  Clear with fresh W. wind. Ther. rose to 82 degrees.
  As I was standing in front of the farm house at
half-past eight this morning I heard the wild clear notes
(the "three deer" call) of an Olive-sided Flycatcher repeated
three or four times in quick succession. The sound only
just reached my ears & seemed to come from the direction
of the cluster of red pines near Mrs. Ritchie's place. I
went there at once & finding nothing was returning along
the road when I suddenly saw the Flycatcher sitting,
perched on the topmost twig of a dead branch of a wild
apple tree in the lower blueberry pasture & within twenty
yards of the road. I watched him for several minutes
but he would not call again. When I looked away
for an instant he disappeared & I neither saw nor 
heard him again. The last Olive-sided Flycatcher I
found in Concord was at Ball's Hill fifteen or sixteen
years ago & in August if I remember rightly.
  Just before I heard the Flycatcher I saw a Sparrow
Hawk flying low & very swiftly past the house in the
direction of Birch Field. It was a small bird probably
a male although I did not make out the tail markings.
Gilbert reported seeing a small Hawk which he thought
belonged to this species passing over the orchard about a week
ago.
  Fireflies were twinkling in the meadow opposite the house
by scores this evening. Black crickets began chirping nearly
two weeks ago & now the fields are alive with them.
The first ripe strawberry was found in our garden today.
All these phenomena are unprecedentedly early I believe.