Field Cricket

Field crickets (Gryllidae) are robust, glossy black to dark brown insects 15–25 mm long with long filiform antennae, two prominent abdominal cerci, and — in females — a needle-like ovipositor up to 20 mm. Males possess a stridulatory file on the forewing used to produce the familiar chirp; call rate rises with temperature. Development is hemimetabolous through 8–10 nymphal instars. In most temperate regions the fall field cricket overwinters as eggs deposited singly in moist soil, hatching in spring, with adults appearing from midsummer through the first hard frost — typically one generation per year. Females may lay 150–400 eggs.

Crickets are nocturnal and strongly positively phototactic, which is why they mass around porch lights, illuminated signage, and loading-dock lamps before slipping indoors. Males call to attract females and defend small territories, sometimes fighting. Feeding is omnivorous and opportunistic: seeds, seedlings, decaying plant matter, dead and live insects, and, indoors, cotton, linen, wool, silk, rubber, leather, and paper — chewing damage often appears as irregular surface grazing rather than clean holes. They do not reproduce successfully indoors in most structures, so interior populations reflect ongoing exterior entry rather than an established colony.