The role of learned song in the evolution and speciation of Eastern and Spotted towhees
Fig 2
Spectrogram illustrating the definition of specific song elements.
On this spectrogram of an Eastern towhee song, we indicate a syllable, silence, bout, maximum syllable frequency, and minimum syllable frequency. The color of the syllable indicates its unique syllable type. Spectrogram generated from Macaulay Library recording 52506381, https://macaulaylibrary.org/asset/52506381.