The male calling song consists of isolated faint 'tick'-like syllables repeated at very variable intervals. Sometimes they are repeated quite regularly every few seconds for long periods (intervals of 1-5 s are commomn), but t other times the intervals may be much longer and occassionally the syllables may be grouped into short sequences during which the repetition rate may be as high as 2/s; generally the syllables are repeated more rapidly at higher temperatures. The number of tooth-impacts within each syllable also varies greatly: 4-6 is common, but as few as 1 or as many as 9 sometimes occur. Frequently the main group of impacts (which is a closing hemisyllable) is followed after a variable interval (usually between 15 and 100 ms) by another one (rarely two), probably produced by a further closure of the fore wings. A hemisyllable of 4-6 impacts usually lasts between 8 and 20 ms.
The song is produced both suring the day and at night, but seldom durting the first few daylight hours of the morning. [1]
Referenser
- . The Songs of the Grasshoppers and Crickets of Western Europe. Colchester, Essex: Harley Books; 1998.