90
Concord, Mass.
1898
May 13
  Clear and very warm with light S.W. wind. Evening calm
and beautiful.
  Spent the day working about the cabin taking a short
walk in the early morning and a longer one in the
evening. The woods and thickets on Ball's Hill and the swamp
behind it swarmed with Warblers all day the greater number
Chetsnut-sides, Redstarts, and Maryland Yellow-throats. The 
only arrivals that I noted were a Water Thrush, a Red-eyed
Vireo and a Yellow-throated Vireo. As on the 11th and 12th
the birds were scattered very evenly through the woods & I
saw no flocks. A Solitary Vireo was singing on Ball's Hill
and a Partridge drumming on the stone wall.
  Early in the forenoon a [female] Pine Warbler visited the
cabin a number of times for nest building material
which she obtained by hopping about on the ground
close to our door. Gilbert traced her to the tall white
pines on the back of the hill but he failed to find the 
nest. He says that the [male] remained singing in these pines
the whole time never once accompanying his mate
on her trips after material.
  Wilson's Thrushes began singing this evening. I heard
one behind Ball's Hill and another in Davis' swamp
besides many other calling. 
   First Bull Frog thumping heard this evening &
first general onslaught of mosquitoes at the same hour.
  The Bittern on Great Meadow began pumping at 2.55 this
morning. A few minutes later a Swamp Sparrow sang.