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Fig. 1 | Avian Research

Fig. 1

From: Gender identification using acoustic analysis in birds without external sexual dimorphism

Fig. 1

Acoustic variables that are mostly applied for bird sexing by voice. Spectrogram (right) and power spectrum (left) of two advertising calls produced by male Magpie Goose (Anseranas semipalmata) are given. Designations: fpeak the dominant frequency, duration the call duration, interval the inter-call interval, f0max the maximum fundamental frequency, f0start the fundamental frequency at the beginning of the call. Calls for this and other illustrations were recorded by the authors

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