[4] It has been found that G. rubens has a peripatric origin derived from one lineage of geographically subdivided ancestor of G.

These results showed that the environment plays big role in determining wing morph in G. rubens.

However, a later study identified that in female G. rubens, genotype plays a bigger role in determining wing morph and in males the environment plays a bigger role in determining wing morph.

[9] Gryllus rubens have three major digestive enzymes: protease, amylase and lipase in their midgut and hindgut.

[10] One of the main difference between the cryptic sister species G. rubens and G. texensisis the structure of their call courtship song.

[11] Specifically, G. rubens have more low-frequency ticks per phrase and more pulses per trill in their courtship songs.

[12] A study in 2006 investigated female G. rubens response to conspecific courtship songs from males dependent on season.