21 s of calling song, male from Dyer County, Tenn., 24.4°C. Dominant frequency 4.7 kHz. (WTL489-28)
This spectrogram is a 2 s excerpt of the 21 s audio file accessible above. The excerpt begins at 15 s.
11 s of courtship song, male from Worcester County, Mass., 23°C. Recording by K. N. Prestwich, used by permission.
This spectrogram is a 2 s excerpt of the 11 s audio file accessible immediately above. The excerpt begins at 3.5 s.
Courtship song:
The soft, nearly continuous, shuffling sounds have a dominant frequency similar to the calling song (4.7 kHz) as do the two-pulse chirps with strong harmonics that are the loudest sounds. In contrast, the brief (10 ms), periodic ticks have their strongest frequencies at about 12 kHz. When courting a female, some males omit the two-pulse chirps in the terminal phase of a successful courtship; others do not.
Identification:
A key to the adult males of native US Gryllus is in Weissman and Gray (2019).
