1906.
August 18
  Clear, calm, hot.
  Came to Concord this morning & drove down to
Ball's Hill reaching there about 11 A.M. In the late
afternoon heard in the woods behind the hill a Cat bird,
a Black & White Creeper (singing feebly & brokenly) and a
Redstart. Flocks of Bobolinks were passing every few
minutes. Two Kingbirds. A flock of 13 Cedar Birds
flying over the swamp.
  After supper I paddled up to Beaver Dam Lagoon.
It was calm and warm with a brilliant sunset, the
sky blocked with rosy clouds. Red-wings were flying about
in small parties and going to roost in the beds of
pickerel weed. Something alarmed them finally when 24
rose from different places and flew off westward.
A flock of 14 Barn Swallows passed & repassed me
many times. I heard them calling after it was too
dark to see them. Neither Forbush nor I has thus
far ascertained where they roost. They are less numerous
now than they were a week or two ago. Two Swamp
Sparrows were in full song & I heard a Maryland Yellow
throat give the flight song twice. A Bittern rose
from the marsh in silence & flew off flapping almost 
as rapidly as a Duck. Two Sora Rails were calling
near me at intervals. One of them made a peeping sound
not unlike a Hyla & then changed to a toc, toc, toc
note which I mistook at first for the distant pumping of
a Bittern. As twilight was passing into night a Night Hawk
skimmed close past me & a Whippoorwill gave a fine repetition
of its song note on the West Bedford shore.