Most healthy adult house crickets can survive roughly two weeks without food, assuming they still have access to water. That number shifts dramatically depending on the species, the cricket’s age and sex, ambient temperature, humidity, how well-fed the cricket was before food ran out, and whether water is also scarce. In laboratory starvation experiments, the interplay between these variables produces a wide range of outcomes, and the science behind how crickets burn through their energy reserves during a food shortage is more layered than you might expect.
Water Matters More Than Food
If you take away a cricket’s food and water at the same time, the clock speeds up considerably. Research on insect starvation using a multiple-stressor framework found that water availability had a larger overall effect on survival-related traits than food availability, affected more traits than food did, and actually mediated the effects of food deprivation itself.1PubMed. Evaluating the effects of water and food limitation on the life history of an insect using a multiple-stressor framework In other words, a cricket without food but with water is in a fundamentally different situation from one deprived of both. The two stresses don’t simply add up; they interact in ways that make the combination far more dangerous than either alone.
This makes intuitive sense if you think about what insects need water for. Crickets lose moisture through their cuticle and respiratory system constantly, and they have limited capacity to conserve it compared to some desert-adapted insects. A cricket that still has access to a damp sponge, a slice of potato, or even condensation on the walls of its enclosure can keep its cells hydrated while it slowly draws down stored energy. Remove that water source, and organ function begins to fail well before the energy reserves run dry. For anyone keeping feeder crickets or a pet cricket, this is the single most important practical takeaway: keeping the water supply going matters more than restocking the food dish on a tight schedule.
How Crickets Burn Through Their Energy Reserves
Crickets store energy in a structure called the fat body, a loose tissue distributed throughout the abdomen that functions somewhat like a combination of the human liver and adipose tissue. The fat body holds three main types of fuel: glycogen (a fast-access sugar reserve), lipids (long-term energy-dense fat), and proteins. Which of these gets burned first, and how fast they’re depleted, determines how long the cricket can hold out.
In the two-spotted field cricket, research on the fat body during the final larval stage shows that glycogen reserves get depleted first, while lipid and protein reserves remain at high levels until much later, dropping sharply only in the final day before a major transition.2PubMed. Age-dependent changes of fat body stores and the regulation of fat body lipid synthesis and mobilisation by adipokinetic hormone in the last larval instar of the cricket, Gryllus bimaculatus This pattern, glycogen first, then lipids, then proteins last, is a common fuel-switching strategy across insects. It mirrors the way most animals handle starvation: burn the quick sugars, switch to fats for the long haul, and break down structural protein only as a last resort.
A study that tracked how insects rely on endogenous fuel reserves during lethal starvation bouts using breath-testing methods confirmed that crickets hit their peak lipid oxidation during the first third of the starvation period.3PLOS ONE. How and When Do Insects Rely on Endogenous Protein and Lipid Resources during Lethal Bouts of Starvation? A New Application for 13C-Breath testing That means crickets ramp up fat-burning relatively early and sustain it for much of the starvation period. Interestingly, the pattern varied among insect species in that study: cockroaches kept burning lipids at high rates right up until death, while moth larvae gradually tapered off. Crickets fell somewhere in between, reflecting the different evolutionary strategies these insects have developed for coping with food scarcity.
Cave Crickets and the Overwintering Extreme
If the question is how long a cricket can survive without food in the most extreme natural scenario, cave crickets offer a striking answer. Two species of European cave cricket, Troglophilus cavicola and Troglophilus neglectus, survive entire winters underground with little to no food intake. Research on their fat body metabolism during overwintering found that the two species handle energy storage in almost opposite ways: one relies more heavily on glycogen throughout the winter, while the other depends primarily on lipids.4PubMed. Role of the fat body in the cave crickets Troglophilus cavicola and Troglophilus neglectus (Rhaphidophoridae, Saltatoria) during overwintering Both species also use protein reserves, though unevenly: all individuals burn protein during the first half of overwintering, but afterward the pattern becomes more variable.
These cave crickets represent one end of the spectrum. They’ve adapted to predictable, prolonged food scarcity by building up massive fat body reserves before winter and dramatically slowing their metabolic rate in cool cave temperatures. A house cricket living at room temperature has none of those advantages. It’s burning energy at a much higher rate and has smaller reserves relative to its metabolic demands. The cave cricket comparison illustrates that “how long can a cricket survive without food” doesn’t have a single answer. It’s species-dependent, environment-dependent, and season-dependent.
Crowding, Sex, and Starvation Resistance
Even within a single species, individual crickets vary a lot in their ability to withstand food deprivation. A study on house crickets reared at different densities found that crowding and sex were both significant predictors of starvation resistance. Crickets raised at higher densities showed reduced ability to survive starvation, and females generally fared differently than males.5Journal of Orthoptera Research. The effects of rearing density on growth, survival, and starvation resistance of the house cricket Acheta domesticus The density effect likely works through competition for food during the growth phase: crickets that had to compete more aggressively for food before starvation began entered the deprivation period with fewer reserves.
Sex differences in starvation resistance are common across insects and usually relate to body composition. Female crickets tend to carry more lipid reserves, particularly when they’re developing eggs, which can give them a longer fuel supply during food deprivation. Males, on the other hand, tend to invest more energy in behaviors like calling and fighting, which can leave them leaner going into a food shortage. The practical implication for cricket farmers is straightforward: overcrowded bins produce crickets that are less resilient overall, and starvation tests at densities below about 0.93 crickets per square centimeter showed minimal impact on survival and starvation tolerance.5Journal of Orthoptera Research. The effects of rearing density on growth, survival, and starvation resistance of the house cricket Acheta domesticus
What Starvation Does to a Cricket’s Body
As a cricket’s food reserves dwindle, the effects go well beyond weight loss. One of the first systems to take a hit is the immune system. Fasting in house crickets lowers the activity of phenoloxidase, an enzyme that’s central to insect immune defense, and reduces the number of hemocytes, the circulating immune cells in the insect’s blood-like fluid. Female crickets appear especially vulnerable to hemocyte loss during fasting.6PubMed Central. Effect of fasting and two different photoperiods on immune parameters in adult male and female house crickets (Acheta domesticus) This means that even if a cricket survives a period without food, it emerges from that period more susceptible to infection and disease. For cricket colonies, this creates a nasty feedback loop: food shortages weaken immune systems, making the colony more vulnerable to the viral and bacterial infections that can sweep through dense cricket populations.
At the cellular level, starvation triggers a stress response in the cricket’s internal organs. Research on the Malpighian tubules (the cricket equivalent of kidneys) in two-spotted field crickets showed that food deprivation caused significant upregulation of stress-response genes associated with the endoplasmic reticulum, the cellular machinery responsible for protein folding. Starvation also activated autophagy, a process where cells begin digesting their own components to recycle nutrients. One autophagy-related gene was ramped up as much as 15-fold compared to fed controls.7Journal of the Kansas Entomological Society. Starvation Induces Endoplasmic Reticulum Stress and Autophagy in Malpighian Tubules of Two-Spotted Field Crickets Gryllus bimaculatus Crucially, the researchers found that starvation induced autophagy but not apoptosis, meaning the cells were recycling parts of themselves without actually dying. This self-digestion appears to be a survival mechanism, not a sign of collapse, at least in the short term.
Autophagy shows up in another starvation-adjacent context in crickets as well. In variable field crickets, the breakdown of flight muscles (a process called histolysis) involves autophagy driven by a protein called Beclin. Transcript levels of the Beclin gene increase dramatically in flight muscles that are being broken down, with autophagic structures like lysosomes and autophagosomes visible in the dissolving tissue.8Integrative and Comparative Biology. Beclin-mediated Autophagy Drives Dorsal Longitudinal Flight Muscle Histolysis in the Variable Field Cricket, Gryllus lineaticeps While this flight-muscle breakdown is part of a normal life-history trade-off (some crickets sacrifice flight ability to redirect resources toward reproduction), the underlying cellular machinery is the same autophagy pathway that gets activated during starvation. Crickets, it turns out, have evolved sophisticated ways to cannibalize their own tissues when resources need to be redirected.
Cannibalism as a Group Survival Strategy
Crickets don’t limit their cannibalism to the cellular level. When food gets scarce in a group, crickets eat each other. This behavior is well documented in migratory bands of Mormon crickets, where researchers showed that protein and salt deprivation are the primary drivers. Providing crickets with protein and salt reduced cannibalistic attacks, and protein satiation specifically inhibited the restless walking behavior that characterizes starving bands. On the flip side, any cricket that became less mobile, whether from injury, exhaustion, or experimental manipulation, was at substantially higher risk of being eaten by its neighbors.9PubMed Central. Cannibal crickets on a forced march for protein and salt
This creates a grim but effective survival dynamic within cricket groups. Starvation drives the group to move, searching for food. The weakest and slowest individuals get consumed, which simultaneously provides protein and salt to the survivors and removes the individuals who were least likely to make it anyway. From an evolutionary perspective, cannibalism extends the effective survival time of the group as a whole, even though it shortens the lives of individual crickets. For anyone raising crickets commercially or as feeder insects, this behavior highlights why adequate food and especially protein supplementation prevents losses from more than just starvation: underfed crickets actively kill each other.
Temperature and the Speed of the Clock
Temperature has an enormous influence on how quickly a cricket burns through its reserves, because insects are ectotherms whose metabolic rate is directly tied to their environmental temperature. A house cricket at room temperature (around 25°C) is active, eating, calling, and burning energy at a steady clip. Drop the temperature to 15°C and that same cricket becomes sluggish, reduces its activity, and its metabolic rate slows considerably. At near-freezing temperatures, some cricket species can enter a state of very low activity where energy expenditure drops to a fraction of its warm-weather rate, which is how cave crickets manage to survive months underground with minimal food.
Conversely, higher temperatures accelerate everything. A cricket kept at 30-35°C will burn through glycogen and lipid reserves faster, need water more urgently, and die sooner without food than one kept at cooler temperatures. This is one reason why survival estimates vary so widely. A cricket in a heated vivarium faces a very different starvation clock than one in an unheated garage in autumn. If you’re trying to keep crickets alive for as long as possible between feedings, cooler storage (within the range the species can tolerate) buys significant time.
Practical Guidance for Cricket Keepers
Whether you’re maintaining feeder crickets for a pet reptile or raising them for another purpose, a few principles emerge from the research:
- Prioritize water: A cricket without water dies far sooner than one without food. Water crystals, damp sponges, or moisture-rich vegetables like carrots and potatoes are more critical than dry food if you have to choose.
- Don’t overcrowd: Higher densities reduce individual starvation resistance, increase cannibalism, and make disease outbreaks more likely when immune systems are already compromised by food stress.
- Provide protein: Protein-deprived crickets are more aggressive and more cannibalistic. A protein source, whether commercial cricket feed, fish flakes, or similar, reduces within-colony killing even when other food is temporarily scarce.
- Use temperature strategically: If you need crickets to last longer between feedings, slightly cooler temperatures slow their metabolism and extend their reserves. Just stay within the species’ tolerance range to avoid cold stress.
Why Exact Numbers Are Hard to Pin Down
If you searched for a clean number like “crickets survive 14 days without food,” the reason you’ll find conflicting answers is that starvation resistance in crickets is shaped by so many interacting variables that no single figure applies broadly. Species matters enormously: a cave cricket adapted to months of fasting is not comparable to a house cricket bred for rapid growth in a commercial facility. Within a single species, the cricket’s age, sex, rearing density, prior nutritional history, body size, and ambient conditions all shift the timeline. Even the way researchers define “starvation” differs across studies. Some provide water and withhold food; others withhold both. Some measure time to death; others measure time to a certain percentage of colony mortality.
The evidence consistently shows that healthy, well-hydrated adult house crickets kept at typical room temperatures can manage roughly one to two weeks without food before mortality climbs sharply. But that range compresses to days if water is also withheld, and it can extend for months in cold-adapted species at low temperatures. The immune suppression and cellular stress that accumulate during even short fasting periods mean that survival alone doesn’t tell the whole story. A cricket that “survives” 10 days without food may emerge from that period with a depleted immune system, reduced reproductive capacity, and damaged organs, all consequences that play out over the days and weeks that follow.