Many, see text Gryllinae, or field crickets, are a subfamily of insects in the order Orthoptera and the family Gryllidae.

Field crickets eat a broad range of food: seeds, plants, or insects (dead or alive).

Females can be identified by the presence of an ovipositor, a spike-like appendage, about 0.75 inches (19 mm) long, on the hind end of the abdomen between two cerci.

In ambient temperatures between 80 °F (27 °C) and 90 °F (32 °C) sexually mature males will chirp, with the acoustical properties of their calling song providing an indicator of past and present health.

After mating, the female will search for a place to lay her eggs, preferably in warm, damp (though not wet) soil.

Field crickets prefer to live in outdoor environments with high humidity, warm temperatures, moist rich soil, and adequate food, but will migrate into human structures when environmental conditions outside become unfavorably cool.

They often gain entry into buildings via open doors and windows as well as cracks in poorly fitted windows, foundations, or siding.Unlike House crickets, which can adapt themselves to indoor conditions, populations of field crickets living in human structures and buildings and without access to warm moist soil for depositing their eggs tend to die out within a few months.