Gryllus rubens

Scudder, 1902

Southeastern field cricket

Gryllus rubens, the southeastern field cricket, is a trilling field cricket native to the southeastern United States. It is a cryptic sister to G. texensis, from which it originated via peripatric speciation. The species exhibits remarkable phenotypic plasticity in its communication system, with male calling songs and female preferences shifting reversibly between spring and fall in response to temperature. Wing is environmentally and genetically influenced, with long-winged morphs appearing in spring/summer and short-winged morphs predominating in autumn/winter.

Gryllus rubens by no rights reserved, uploaded by Ken Kneidel. Used under a CC0 license.

Gryllus rubens by (c) Tyler Bishop, some rights reserved (CC BY), uploaded by Tyler Bishop. Used under a CC-BY license.

Field cricket at Mechode Padur by വരി വര. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Gryllus rubens: /ˈɡrɪl.əs ˈruː.bɛnz/

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Identification

Morphologically indistinguishable from G. texensis; females have longer ovipositors than G. texensis. Distinguished from G. firmus by slower call song and pale lateral forewing field with inconspicuous and crossveins (G. firmus has venation paler than the lateral field background). Distinguished from G. texensis by courtship song structure: more low-frequency ticks per phrase and more pulses per trill.

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Habitat

Lawns, roadsides, pastures, and open ground. Associated with sandier soils in southeastern coastal areas, particularly peninsular Florida.

Distribution

Southeastern United States, from southern Delaware to extreme southeastern Kansas, south to Florida and eastern Texas. Sympatric with G. texensis in areas including Tuscaloosa, Alabama; occur in Gainesville, Florida.

Seasonality

with spring and fall ; active year-round in northern Florida. Spring generation produces long-winged morphs; fall generation produces predominantly short-winged morphs.

Host Associations

Ormia ochracea - Tachinid fly that locates using male calling songs; larvae develop within host and emerge in about 7 days, killing the host

Life Cycle

Facultative nymphal ; no diapause observed. Eggs laid in soil; nymphs emerge in spring. Wing influenced by season, , and environment.

Behavior

Males produce trilling calling songs with -specific pulse rates; courtship songs contain quieter low-frequency ticks with louder high-frequency ticks at regular intervals. Young males respond to songs by phonotaxis (moving toward the sound); older males respond acoustically with their own songs. Males engage in aggressive interactions involving chirping, jaw snapping, and foreleg grappling. Females show strong phonotactic preferences for conspecific pulse rates and courtship songs; female responsiveness varies seasonally, with autumn females less responsive to male song than spring females, likely due to increased risk. Satellite males may adopt non-calling strategies.

Human Relevance

Male calling songs can be used to estimate ambient temperature (Dolbear's Law principle, though specific calibration not established for this ). Occasional household invader in autumn. Subject of extensive research on speciation, communication plasticity, and .

Similar Taxa

Gryllus texensisCryptic sister ; morphologically indistinguishable but distinguished by courtship song pulse rate and structure; G. rubens has more low-frequency ticks per phrase and more pulses per trill
Gryllus firmusOverlapping range; distinguished by faster call song and forewing venation pattern (G. firmus has venation paler than lateral field background)