spring field cricket
Gryllus veletis (Alexander and Bigelow 1960)

map	male

	20 s of calling song [1.77MB]; male from Berrien County, MI; 25.6°C. (WTL488-4)
	5 s of calling song [255KB]; same as above but truncated and down-sampled.

Sound spectrogram of 2 s of calling at 25.6°C (from WTL488-4). Dominant frequency 4.9 kHz.
Click on spectrogram to hear graphed song.

G. veletis and G. pennsylvanicus cannot be reliably distinguished by either song or external morphology (although in some localities the ovipositors of G. pennsylvanicus average substantially longer than those of G. veletis). However, G. veletis overwinters as mid-to-late instar juveniles, whereas G. pennsylvanicus overwinters in the egg stage. Both species have only one generation per year. Consequently, G. veletis adults are most abundant in spring and G. pennsylvanicus adults are most abundant in fall. In all localities where the species have been studied, a few adults of the two species occur together in midsummer.

More information:  subfamily Gryllinae, genus Gryllus

References:  Burpee & Sakaluk 1993a, 1993b; see additional references on genus page.

Nomenclature:  OSF (Orthoptera Species File Online)