Davisís tree cricket
Oecanthus exclamationis Davis 1907

antennal markings 

20 s of calling song [1.73MB]; male from Cochise Co., Ariz.: Chiricahua Mts.; 25.8įC. (WTL590-16c)
6 s of calling song [260KB]; same as above but truncated and downsampled.

Sound spectrogram of 2 s of calling at 25.8°C (from WTL590-16c). Dominant frequency 2.6 kHz.
Click on first half of spectrogram to hear graphed song.
Click on last half of spectrogram to expand its spectrographic image.

Identification:  Length 16–18 mm. Black mark on first antennal segment straight; no orange on the vertex.

Habitat:  Crowns of broad-leaved trees; sometimes in understory trees and tangled undergrowth.

Season:  Early August to mid-October in Ohio; June to Sept. in north Florida. One generation annually.

Song at 25°C:  A melodious trill irregularly interrupted, usually briefly and often after the trill has continued without interruption for >5 sec. Pulse rate 81/sec; frequency 2.7 kHz. Most easily confused with song of two-spotted tree cricket, but that species has a pulse rate of ca. 112/sec.

Song data:  See Walker 1962.

Similar species:  Narrow-winged tree cricket—black mark on first antennal segment J-shaped or strongly curved toward inner side; vertex marked with orange.

Remarks:  Davis's tree cricket not only shows a disjunct distribution in the United States, where it occurs in the eastern deciduous forest and in isolated, similar habitats in mountains in southern Arizona, but also occurs in southern Mexico (Walker 1967).

More information:  genus Oecanthus, subfamily Oecanthinae.

References and Links:  Fulton 1915; Walker 1962, 1967; Walker & Gurney 1967. Collins 2010-date.

Nomenclature:  OSF (Orthoptera Species File Online).