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. 2010 Oct 4;5(10):e13144. doi: 10.1371/journal.pone.0013144

Figure 3. Courtship ultrasounds of O. nubilalis, O. scapulalis, and O. furnacalis.

Figure 3

A) Ultrasounds of O. nubilalis (Z type, Darmstadt). Upper: oscillogram showing the entire song train. Middle: expanded oscillogram showing pulse pairs including pulse 1 (P1) and pulse 2 (P2), which exhibit different temporal features and amplitudes. Lower: spectrogram of the three pulse pairs. P1 is defined as the pulse in a pulse pair with the shorter pulse interval. PD and PI denote pulse duration and pulse interval, respectively. B) Pulse pairs of O. scapulalis (Z type, Morioka). C) A pulse group of O. furnacalis. Audio files of Z-type O. nubilalis, Z-type O. scapulalis and O. furnacalis are available online in the supplementary materials (Audio S1, S2, and S3). See Table 1 for collection sites of the populations examined.