Cambridge, Mass.
1913.
Feb. 5
[February 5, 1913]

  Clear and rather cold with blustering N.W. [northwest] wind. Ground
buried beneath 4 inches of snow & evergreen branches well loaded with it.

Parus hudsonicus.

   The Hudsonian Tit came to the suet at 4.45 P.M. as I was writing
at my desk. Just before reaching and immediately after leaving it, while 
within a yard of it and scarce three yards from me, he uttered a 
succession of notes unfamiliar to me. I wrote them down, only a few
seconds later, as follows: Til - li -hee, lee - hil - lee; til - li - hee, lee -
hil - lee. Can this be the "song" described by Allen, Townsend & others? If
so I think it has been overestimated although all the notes were bright
cheery and pleasing while some (the til & hil ones)were liquid and
rather musical. The whole performance was very like that which the
Black-cap Chickadee often indulges in when in merry mood yet
appreciably different. I heard every note distinctly, although through
the closed windows. The bird also uttered a faint ti - ti and the
ordinary harsh, emphatic call which I heard to unusual 
advantage and rendered immediately afterwards thus: Tse - tse - dee.

Feb 6 [February 6, 1913]  Clear and cold with N.W. [northwest] wind.
  Hudsonian Tit came four times to the suet by my window
remaining each time from 20 to 60 seconds (estimated). I noted his visits thus: - 
11.45 A.M. Approached with the ordinary tse - tse - dee call, given twice
3.45 P.M. Approached with the ordinary tse - tse - dee call, given twice
4. P.M. Approached with a low, musical chirrup (tir - r - r- r - r ,
tir - r - r - r - r) very like the subdued,
drowsy chirping of black Field Crickets of
a frosty morning. This was repeated as he went off.
4.15 P.M. Approached with the ordinary tse-tse-dee, dee call
4.47 P.M. Approached with the ordinary tse-tse-dee, dee call