Cambridge, Mass.
1913

Parus hudsonicus.

  For purposes of direct comparison all my renderings of
the vocal utterances of the Hudsonian may be brought together
and summarized as follows:

Variations of song. -

Til-le-hee, lee-hill-lee; til-li-hee, lee-hil-lee. All these
notes bright, cheery and pleasing, some liquid & rather musical (Feb 5 [February 5, 1913])
Pse-teedle, pse-teedle, pse-teedle; pse-teedle-pse-teedle-pse-teedle
All these notes clearly ununciated, rather loud, bright, if not also
merry, in quality (Feb. 7 [February 7, 1913])
Tweedle-tweedle-tweedle-tweedle. Repeated five or six times &
suggestive of song of Carolina Wren but more listless & less loud.
All the notes alike & on the same key. They sounded flat &
monotonous to my ears (Feb. 7 [February 7, 1913])
T'slee-t'slee'-t'slee-t'slee, tslee-t'slee-t'slee-t'slee. Always
just eight notes essentially alike & in same key, divided by a
slight pause in two groups of four each, given in a loud,
insistent, monotonous voice which seemed to fill the whole garden.
Song reminded me of Carolina Wren's but less melodious.