52 s of calling, from Tulare County, Calif., 24.2°C. Dominant frequency -- kHz. Recording by D.B. Weissman (S16-21, R16-60); used by permission. Click on sound bar to hear entire recording.
This sound spectrogram is a 4 s excerpt of the 52 s audio file accessible immediately above. The excerpt begins at 28 s. Click on sound bar to hear graphed song.
Song at 25°C:
Song in some populations consists of sequences
of 3-pulse units produced at a rate of ca. 17 units per sec. (see upper spectrogram).
The effect is a "stutter trill." In other populations sequences of single pulses
and of pairs are the rule (see lower spectrogram).
As early as 1980 David B. Weissman began publishing the results of his field and laboratory studies of the Gryllus of the United States and Canada (Weissman et al. 1980). By 2003, David Gray had started his cooperation with Weissman by providing genetic analysis of the living Gryllus made available by Weissman's studies (e.g., Weissman, Walker, and Gray 2009). Weissman and Gray's results regarding the Gryllus of US and Canada are in ms and their target date for publication is May 2019. Their results will be made publicly available on SINA as soon as possible.