southeastern field cricket
Gryllus rubens Scudder 1902

map
long-winged male
short-winged female
female
short & long wings
four morphs
forewing
file characters
 
 
 
ovipositor length
 
 
 

10 s of calling song [795KB]; male from Leon County, FL; 25.4°C; smooth trill. (WTL482-189b)
6 s of calling song [257KB]; same as above but truncated and down-sampled.
22 s of calling song [1.78MB]; male from Pope County, IL; 24.0°C; stuttery trill. (WTL482-61)
7 s of courtship song [603KB]; male from Florida. [Recording by D. A. Gray; used by permission.]

spectrogram
Sound spectrogram of 2 s of smooth calling at 25.4°C (from WTL482-189b). Dominant frequency 4.8 kHz.
Click on spectrogram to hear graphed song.


Sound spectrogram of 2 s of stuttery calling at 24.0°C (from WTL482-61). Dominant frequency 4.9 kHz.
Click on spectrogram to hear graphed song.

This species and Gryllus texensis are the only trilling Gryllus in the eastern United States. (All others are chirpers.)

The trills of G. rubens vary in the regularity of the pulse sequences. When the pulses are interrupted by brief pauses lasting as long as a single pulse or a little longer, the trill sounds "stuttery." When the sequence of pulses is uninterrupted, the trill is "smooth." In some populations, stutter trilling is common. In others it is rare. Captured males do not always produce a single type of trill. The origin and significance of the variation in the smoothness of the trills is unknown.

G. texensis tends to produce shorter, more regular trills than G. rubens, but where they occur together, the two can be distinguished reliably only by the pulse rates of their calling songs—after the rates have been adjusted for temperature. Even though the two species are (thus far) almost indistinguishable morphologically (Gray et al. 2001) and readily hybridize in the laboratory, they maintain their integrity in the field (Walker 1998, 2000).

N. Fla. seasonal data.

More information:  subfamily Gryllinae, genus Gryllus

References:  See genus page.

Nomenclature:  OSF (Orthoptera Species File Online)