Oscillograms of male-female-duets. Stridulatory movement of female Leptophyes and Andreiniimon together with male-female duet (sound A, D, E, G, I) or male-female duet, sound only (B, C, F, H). Oscillograms of stridulatory movement and song [synchronous registration of left tegmen movement and sound (upper line: upward deflection represents opening, downward closing; lower line: sound)]. A–C female reaction to model of male song D female reaction to heterospecific male song (see text) E–I female reaction to conspecific male song. Female responses in box highlighted in red, proposed trigger point marked with red arrow.