Published October 26, 2026 · The Cricket Depot, San Antonio, Texas
Crickets are among the most familiar insects in the world, mostly because of their sound. Behind that sound is a quick and interesting life. This article focuses on how house crickets (Acheta domesticus) develop and how chirping works. For a stage-by-stage photo guide, see our cricket life cycle page, and for the role crickets play outdoors, including the well-known link between chirping and temperature, read crickets in nature.
Incomplete metamorphosis
Butterflies and beetles go through complete metamorphosis: egg, larva, pupa, adult, with dramatic changes in body shape. Crickets do not. They go through incomplete metamorphosis, with just three stages: egg, nymph and adult. A newly hatched cricket already looks like a tiny, wingless version of its parents. It grows by molting and gradually develops wings and reproductive organs, rather than transforming inside a pupa.
Eggs
Adult females lay eggs through a long, needle-like tube at the end of the abdomen called an ovipositor, which you can see sticking out between the two rear "tails" (cerci). Females push it into moist soil or another damp substrate and deposit eggs one at a time. Each female can lay many eggs over her adult life. Development time depends strongly on temperature; in warm conditions house cricket eggs typically hatch in roughly one to two weeks, and much more slowly in cool conditions. Breeders control temperature carefully for this reason, as covered in our breeding guide.
Nymphs and molting
A cricket's exoskeleton cannot stretch, so to grow it must shed it. Each stage between molts is called an instar. House crickets usually go through around eight to ten molts before adulthood, though the exact number can vary with conditions.
During a molt, the old skin splits along the back and the cricket pulls itself out, pale and soft. Over the next hours, the new exoskeleton hardens and darkens. Freshly molted crickets are vulnerable, which is one reason crowding leads to cannibalism: soft crickets are easy targets. In the later instars, small wing pads appear on the back and get larger with each molt.
Adulthood
With the final molt, the cricket becomes an adult with fully formed wings. In warm conditions, house crickets can reach adulthood in roughly six to eight weeks from hatching. Adults then typically live for several more weeks. Their main job at this stage is reproduction, and that is where chirping comes in.
Telling males and females apart is easy in adults. Females have the ovipositor. Males do not, and their wings have a more textured, veined pattern that is part of their sound-making equipment.
How chirping works
Crickets do not chirp with their mouths or legs. They produce sound by stridulation: rubbing one body part against another. In crickets, the base of one front wing has a row of tiny teeth, called the file, and the edge of the other wing has a hardened scraper. The male raises his wings and moves them so the scraper runs across the file, much like running a fingernail along a comb.
Each tooth strike produces a tiny vibration, and special areas of the wing act like a sounding board, amplifying it into the clear tone we hear. Different cricket species have different wing structures, so their songs differ in pitch and rhythm. Only males have the specialized wing structures, so only males chirp.
Different songs for different jobs
Researchers who study cricket behavior generally describe several kinds of songs:
- Calling song: the loud, repeated chirp that attracts females from a distance and tells other males where a male is.
- Courtship song: a quieter, different song used when a female is nearby.
- Aggressive or rivalry song: produced when two males meet and compete.
In a cricket bin, the loud chirping you hear at night is mostly calling song from adult males.
How crickets hear
Crickets do have ears, just not where you would expect. Their hearing organs, called tympanal organs, are on the front legs, just below the "knee." A thin membrane vibrates in response to sound, similar in principle to an eardrum. This lets females locate a calling male and helps crickets detect some predators.
Why crickets go quiet
If you walk toward a chirping cricket, it often stops. Crickets are sensitive to vibration and movement, and going silent is a way to avoid predators that hunt by sound. Cooler temperatures also slow cricket activity in general, which affects chirping too. Pet owners sometimes notice a bin gets quieter when the room cools down at night.
Antennae, cerci and other senses
Hearing is only one of a cricket's senses. The long, thread-like antennae on the head are covered in sensory hairs that detect touch, smell and taste, and crickets sweep them constantly to explore surfaces, find food and recognize other crickets. At the rear, the two cerci work like a pair of motion detectors. Tiny hairs on them respond to air movement, which helps a cricket sense an approaching predator and jump away before it is touched. This is one reason crickets can be so hard to catch by hand: a sudden puff of air from your moving fingers may reach the cerci before your hand does. Their compound eyes add a wide field of view, though crickets are mostly active in low light and lean heavily on touch, vibration and sound. Together, these senses explain much of the jumpy, alert behavior you see when you open a cricket bin.
What it means for pet owners
A few practical takeaways: if chirping bothers you, smaller sizes do not chirp because they are not yet adults. Molting crickets are soft and fragile, so a crowded bin can lead to losses. And because crickets grow quickly in warmth, a batch of nymphs will change size over a couple of weeks. Our cricket sizes guide explains how to plan for that.