Figure 1 | Scientific Reports

Figure 1

From: The transition from the female-like great calls to male calls during ontogeny in southern yellow-cheeked gibbon males (Nomascus gabriellae)

Figure 1

Representative spectrograms for a male (A) and a female (B) showing the vocal patterns of southern yellow-cheeked gibbons (adapted from Hradec and colleagues20). In the male spectrogram, the “multi-modulation” phrase is divided into three notes (blue dashed lines). The second note shows the most rapid change in frequency modulation of the steep up-and-down sweeping sound of the “multi-modulation” phrase (red dashed rectangle).

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