Concord, Mass.
1909.
March 18
(No 4)
appeared to find plenty of food which, I inferred,
must be birch seeds, as I did not see them feeding
anywhere except under birches.
Redpolls
  During most of the time I was watching this
flock of Redpolls their calls came to my ears almost
incessantly but I did not hear any of them sing.
Call notes of Redpoll
[On the morning of March 20 I heard the full song twice near at hand. It was
a smooth, sweet trill - tsweeeeeee- pitched high & all in same key, I think]
Song
The flight call was used oftenest, even when the birds
were perched. It is rather hard or woodeny, or like
the sound of small pebbles striking against one another;
yet it is subject to soft and rather sweet modulations.
I should write it tah-tche or tch-tche-tche.
Sometimes there is but one syllable - tche. A much
sweeter note, less often heard and usually given when
the bird is perched in a tree top, is pee-e, very
like the may be of one Goldfinch. This call has
a rising inflection & is very pleasing in quality.