Concord, Mass.
1909.
March 19
(No 2)
  A flock of about 25 Goldfinches in gray birches
included a few Redpolls. I not only heard their calls but
saw three or four of them distinctly. None of the Goldfinches
showed any bright yellow but one of the males sang in
rather subdued tones a few times.
Goldfinches & Redpolls intermingled in one flock.
  A pair of Chickadees at Ball's Hill were looking for a 
nesting site, apparently, and examining all sorts of crevices most
of which were so obviously unsuited to their purpose that I
wondered why they should waste time inspecting them. One bird,
the male no doubt, whistled the phoebe note and also called
twer-de-de at frequent intervals. This call is very unlike the chick-a-dee-dee.
Notes of Chickadee
  There were four Red-wings in full song in the button bushes
opposite Ball's Hill. They sang by turns, never interrupting one another.
Each bird used always the same notes. One bird said something
like oh-erk-er-lee, one oak-er-lee and two simply
quer-lee (distinctly only two syllables)
Song of Red wing Blackbirds