Quantitative Tools for Examining the Vocalizations of Juvenile Songbirds
Figure 1
(a) Spectrogram of a bout of singing from an adult zebra finch. Noted in the figure are the following song parts: introductory notes, underlined in red; syllables, underlined in green; the silent interval between syllables, underlined in yellow. The blue lines mark the repetitions of the bird’s motif. Note that each performance of the motif appears much like the others, except for the truncated final motif. (b) Spectrogram of a bout of singing from a different zebra finch. Although its song is also highly stereotyped, it is visibly different from the song of the bird featured in (a). For convenience, blue lines once again mark repetitions of the bird’s motif.
