Fig. 7. Spectra of two response whistles that were higher in amplitude than the usual responses seen in Fig. 4C. Note that the 5 m whistle spectra show a higher low-frequency amplitude and much lower high-frequency amplitude than the 300 m whistle.
Fig. 7. Spectra of two response whistles that were higher in amplitude than the usual responses seen in Fig. 4C. Note that the 5 m whistle spectra show a higher low-frequency amplitude and much lower high-frequency amplitude than the 300 m whistle.