How is the typical song pattern of the Mourning Warbler often transcribed?

Answer

*teedle-teedle, turtle-turtle*

The typical song of the Mourning Warbler is described as loud, ringing, and musical, often transcribed as *teedle-teedle, turtle-turtle*, with the final two notes being noticeably lower in pitch.

How is the typical song pattern of the Mourning Warbler often transcribed?
birdornithologyidentificationwarbler