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Figure 4


Fig. 4. Seismic idle displays of Schizocosa stridulans. (A) Body positions with columns (i–iii) illustrating movements of the palpal tibio-cymbial joint. (B) Oscillogram of idle displays. (C) Spectrogram of idle displays. Panels are shown in the same time scale, with columns corresponding to the body movements illustrated in A. Signals begin with leg tapping, followed by flexions of the palpal tibio-cymbial joint. Palpal movements correspond to the production of high frequencies.