Concord, Mass.
1909
March 21
(No 3)
  The country is still flooded with Redpolls. I saw
this morning one flock of fully fifty and another of about
twenty-five, on wing and one little company of seven or
eight (in Birch Field) and a solitary bird (at Ball's Hill)
feeding on the ground under birches. To say that the males
in the moving flocks were in full song fails to do
justice to the fact. Both flocks passed directly over
me and as they did so it seemed as if every bird
in each was singing at once. Their swe e e e e e notes
mingled together in an unbroken and perfectly uniform
volume of sound which reminded me of the frying
sounds of cicadas although it was different in quality
and indeed very sweet & pleasing. I heard it without
cessation as long as the birds were within earshot.
They uttered no other notes except their ordinary flight
calls and those were almost drowned by the song notes.
Abundance of Lesser Redpolls
A solitary Redpoll.
Chorus singing of Redpolls while on wing