Fig. 1
Spectrogram of a food call of (a) a juvenile, (b) a subadult, and (c) an adult common raven (FFT method, window length = 0.01, time step = 0.002, frequency step = 20, Gaussian shape)
Fig. 1 | Frontiers in Zoology
Spectrogram of a food call of (a) a juvenile, (b) a subadult, and (c) an adult common raven (FFT method, window length = 0.01, time step = 0.002, frequency step = 20, Gaussian shape)
Frontiers in Zoology