different-horned tree cricket
Oecanthus varicornis F. Walker 1869

15 s of calling song [1.30MB]; male from Hidalgo Co., Tex.; 25.0C. (WTL593-7)
6 s of calling song [259KB]; same as above but truncated and downsampled.

Sound spectrogram of 2 s of calling at 25.0°C (from WTL593-7). Dominant frequency 3.8 kHz.
Click on spectrogram to hear graphed song.

Identification:  Length 15–18 mm. Third segment of the antenna usually much darker than the second; stridulatory file 0.86–1.20 mm long with 26–36 teeth.

Habitat:  Xeric woodland; often high in vine-covered trees.

Season:  Apparently year round; adults collected all months except October and November.

Song at 25°C:  Continuous, musical trill at 76 p/s and 3.7 KHz.

Song data:  Excel worksheet and chart (from spectrographic analyses).

Similar species:  Texas and western tree crickets—more than 40 teeth in stridulatory file, calling songs with pulse rates <65/s.

Remarks:  Different-horned tree crickets often sing from higher perches than is characteristic of the other members of the broad-winged species group of Oecanthus.

More information:  genus Oecanthus, subfamily Oecanthinae.

References and Links:  Walker 1962, 1967. Collins 2010-date.

Nomenclature:  OSF (Orthoptera Species File Online)