B. Fulton showed that four populations of field cricket in North Carolina, that were morphologically identical and which were all considered to be G. assimilis, produced four different songs.

Once these eight species were distinguishable by song, tiny morphological differences were discovered between them, such as the precise number of teeth on the stridulatory mechanism.

[2] None of these species are the Jamaican field cricket, which was first described in 1775 by the Danish zoologist Johan Christian Fabricius, the type locality being Jamaica.

[1] There are two subspecies :[1] Gryllus assimilis occurs in the West Indies, southern United States, Mexico and parts of South America (Ecuador, Peru, Bolivia, Paraguay and North of Argentina).

Nymphal stages take place for another three six to seven weeks, at which point the insect reaches sexual maturity and the males begin calling for females.

A bit latter, in 1997, the cricket eggs under name "Gryllus argentinus" came from Paris Museum of Natural History to St. Petersburg.