Acheta domesticus (Linnaeus, 1758)

House cricket

The midnight violinist behind your furnace, one male cricket, one very loud night.

Order: Orthoptera
Family: Gryllidae
Group: Occasional invaders
Ontario status: Established, heated buildings; often escapees from pet-feeder colonies

Why it matters

A fabric and stored-food pest and a world-class noise nuisance, but also a clue. Indoor breeding crickets mean a warm, food-rich void exists, often tracing back to an escaped pet-feeder colony. Find the warmth, find the crickets.

Origin

Probably southwestern Asia; now worldwide, and increasingly arriving via the pet trade as reptile food.

Behavior

The male rubs his wings together to sing, for a mate, for territory. One male in a quiet house sounds like an orchestra. Active at night, silent by day.

Living conditions

Warm indoor spots, furnace rooms, behind appliances, pet stores, and anywhere escaped feeder crickets found heat and crumbs.

Signs of presence

Loud chirping at night from behind appliances or in utility rooms
Chewed spots on wool, silk, or paper in warm storage areas
Tiny dark droppings near the singing site
Crickets of mixed sizes (nymphs to adults) indicating a breeding population

Weaknesses

Needs warmth, cool rooms stop breeding entirely
The song gives away the male's exact location every time
Cannot survive an Ontario winter outdoors; the building is its whole world
Dependent on crumbs and moisture; clean dry utility rooms starve it out

Myths and facts

Myth Crickets in the house mean good luck, so leave them.
Reality Folklore aside, a breeding population chews wool, silk, paper, and stored food, and the luck runs out around the third sleepless night.

Research notes

Morphology

Body 16-22 mm; yellowish-brown with darker markings; long antennae; females with a straight ovipositor; males with forewings modified for stridulation. Hind legs built for jumping.

Diagnostics

Pale brown cricket, chirping males, indoors in warm zones. Breeding populations (nymphs of mixed sizes plus singing males) confirm establishment rather than incidental entry.

Easily confused with

Field cricket (Gryllus spp.) Field crickets are larger, blacker, and outdoor species that wander in; house crickets are paler and breed indoors.
Camel cricket (Ceuthophilus spp.) Camel crickets are humpbacked, wingless, silent, and damp-basement dwellers; house crickets chirp and are warmth-loving.

Life cycle

Adult: Adults live 2-3 months; males sing, females lay eggs in moist crevices
Egg: Eggs laid in damp cracks and soil; hatch in ~2 weeks in warmth
Egg to adult: 2-3 months at 25-30 C; far longer when cool
Generations per year: 2-3 in heated buildings
Nymph or larva: Nymphs are wingless miniatures; 8-10 molts to adulthood

Development

Hemimetabolous, egg to nymph to adult through 8-10 instars. Warmth accelerates everything; a furnace room is a cricket incubator.

Reproduction

Males sing to attract females; females lay hundreds of eggs in moist substrate over their adult life. A single escaped pair near a furnace can found a building population.

Distribution

Global: Cosmopolitan in heated structures; also mass-reared as feeder insects and human food
Native range: Probably southwestern Asia
Ontario: Established in heated buildings; wild outdoor survival impossible in winter

Ecology

Omnivorous scavenger, fabrics, paper, pet food, crumbs. In Ontario buildings, populations often trace to escaped feeder crickets from pet stores and reptile keepers. Cannibalistic at high density.

Resistance

Unknown, managed physically; no documented resistance.

IPM implications

Monitoring: glue boards in warm utility areas; the song itself is a monitoring tool, one singing male locates the harborage. Management: find the warm breeding site (furnace rooms, pet-store stockrooms), remove food and harborage, seal entry, dehumidify. This is a warmth-and-food insect; cool, clean, and sealed beats any treatment.

Chemical ecology

Acoustic, not chemical, communication, males stridulate by rubbing forewings; females phonotax to the song. No defensive chemistry of note.

Genetics and DNA

A chromosome-level annotated reference genome was published in 2023 (Johnston et al., Biomolecules 13(4):589), the first high-quality genome assembly of A. domesticus, with CRISPR/RNAi resources.

Taxonomy

Order Orthoptera, family Gryllidae. Authority (Linnaeus, 1758). Now also a farmed insect, the same species is raised for pet food and human protein.

Open questions

Proportion of Ontario indoor populations derived from feeder-cricket escapees vs. long-established lines.

References

Ebeling, W. (1978). Urban Entomology, University of California, Riverside.