Cambridge, Mass.
1913
March 4
[March 4, 1913]

Parus hudsonicus in The Garden

  Cloudy, chilly and calm. At 2.45 P.M. I heard the
Hudsonian Tit among the rhododendrons near my window calling
chee - dee; chee - dee; tsip; tsip; tsip; chee - dee; chee - dee; chee - dee;
tchip - chee - dee, dee. All this repeated many times but the
bird did not show himself. At 3.30, however, he appeared at
the suet and spent 5 seconds there announcing his arrival by calling
pse - pse - dee, pse - pse - dee several times very like a Black-cap 
chickadee [Black-capped Chickadee].

March 6 [March 6, 1913]  Cloudy, calm & chilly but not frosty. Storm evidently gathering.
The Hudsonian appeared at the suet at 11.40 A.M. and remained
40 seconds. He called pse - pse - pse once in faint, lisping tones
just as he reached it. At 2.30 P.M. he returned and without
showing himself called tsip twice and twice uttered a song
which reminded me of a House Wren's being almost equally
gushing and musical but different in form and less loud. I
rendered it: Sweet, swee - swee - swee - swee, sweet. In some
respect this performance was unlike anything that I have heard 
from the bird before.