Glendale, Mass.
1912
June 9
[June 9, 1912]

  Clear & cool with brisk N. W. [northwest] wind. Ther [thermometer] 62 [degrees] at noon.

Dendroica caerulescens with peculiar song.

  As I am writing under the hemlocks at the rear of the
studio I hear the same Black-throated Blue Warbler who
was here two or three years ago. At least he has the same
peculiar song. This I should render ti-ti-ti-ti-tease (or teeze)
These notes are given quickly and only the final teeze has
any suggestion (and this but slight) of the usual drawling, buzzy
quality. Indeed the song as a whole is bright, lively and
rather musical. Nevertheless it is somewhat suggestive of that
of the Yellow Hammer of England, especially the terminal notes
which might well be rendered "cheese".
  The song just described ceased a few minutes ago and
was immediately succeeded by the normal song of caerulescens 
coming from the same place, and, I feel almost sure, from
the same bird. This has been repeated a dozen times or more.
  Now the ti-ti-ti-ti-cheese is resumed & given knowingly again*
*After this I heard daily, up to June 16 [June 16, 1912], the ti-ti-ti-ti-teese song
but never once again the normal song.