Fig. 3 in Characterization of stridulatory structures and sounds of the larger Mexican pine beetle, Dendroctonus approximatus (Coleoptera: Curculionidae: Scolytinae)

Fig. 3. Temporal and spectral characteristics assessed for simple chirps made in a disturbance context. Train of individual pulses a), waveform b), and spectrogram c) from sample chirp produced by male in a disturbance context. The peak frequency (3.468 kHz) is noted for the first recorded chirp (occurring at 0.3 s).