Tettigonia hispanica (Bolívar, 1893)

The loud calling song is very similar in rhythmic pattern to that of T. viridissima, consisting of sequences of disyllabic echemes and varying with temperature in a similar way; it is also produced mainly in the afternoon and after dark. However, it has a more sibilant quality and at a given temperature the echeme repetiton rate is lower than in T, viridissima, varying from 2 to 10/s at temperatures ranging from 15 to 30°C. The echeme-sequences are typically interrupted at irregular intervals (usually more frequently than T. viridissima) by very short pauses of about 0.2-1.0s, but occassionally there are much longer pauses and sometimes the sequences continue for up to a minute or more without interruption, especially at lower temperatures and at night.

Oscillographic analysis shows that most of the sound is produced by the closing strokes of the fore wings, but in all the songs studied there were quiet opening hemisyllables. The durationa nd structure of the closing hemisyllables and the gap between each pair are similar to those of t. viridissima; as in that species, the second closing hemisyllable of each pair is usually slightly longer than the first. The intervals between successive echemes are about 50-300ms, depending on the temperature. [1]

Références