Most adult crickets can survive roughly one to two weeks without food, provided they have access to water. Without water, survival drops sharply to just a few days. Water is the more urgent need by a wide margin, and research on cricket physiology consistently shows that water deprivation has a larger and faster impact on survival than food deprivation alone. The answer shifts depending on species, temperature, humidity, and the cricket’s age and condition, but the core pattern holds across the board.
Water Deprivation Is the Real Killer
If you are keeping crickets as feeder insects or pets and wondering which supply matters more, the answer is unambiguous. A study using a multiple-stressor framework to test the effects of food and water limitation on cricket life history found that water availability had a larger effect on traits than food availability, affected more traits, and even mediated how food availability influenced the insects. In that experiment, only water limitation significantly affected survival, while food limitation alone did not produce the same lethal outcome on its own timeline.1PubMed. Evaluating the effects of water and food limitation on the life history of an insect using a multiple-stressor framework
This makes intuitive sense when you consider what crickets are made of. Like all insects, a cricket’s body is mostly water. They need it to maintain blood pressure (technically hemolymph pressure), cool themselves through evaporation, digest food, and transport nutrients. A cricket that has food but no water will still die quickly because it cannot process the food or keep its internal chemistry stable. A cricket with water but no food, on the other hand, can draw on stored body fat and glycogen for energy and keep ticking for significantly longer.
How Crickets Lose Water
Crickets are small, and small animals have a high surface-area-to-volume ratio, which means they lose water relatively fast compared to their body size. Their exoskeleton helps slow this down. The outer waxy layer of insect cuticle acts as the primary barrier to water loss, preventing moisture and ions from escaping to the surrounding air.2Oxford Academic. Exoskeletons across the Pancrustacea: Comparative Morphology, Physiology, Biochemistry and Genetics But the exoskeleton is not a perfect seal. Water escapes through three main routes: the cuticle itself, the breathing system, and the digestive openings.
Research on the house cricket measured how much water escapes from different body regions and found that oral and anal discharges of fluid were responsible for a large portion of total water loss. When researchers experimentally sealed the mouth and anus of house crickets with paraffin, water loss at 30°C dropped by about 82%. Breathing rate also fell by roughly 46%.3Journal of Experimental Zoology. A new system for concurrent measurement of respiration and water loss in arthropods That tells you the gut and mouth are major leak points, not just the skin. When a cricket is stressed, active, or eating dry food, those discharges increase, and water loss accelerates. A cricket kept in a hot, dry, low-humidity environment with no water source will dehydrate far faster than one in a cool, humid space.
Temperature and Humidity Change the Timeline
The range of “a few days without water” can stretch or shrink dramatically depending on environmental conditions. Higher temperatures speed up a cricket’s metabolism, increase breathing rate, and drive more evaporative water loss through the cuticle. A cricket at 35°C will dehydrate in a fraction of the time it would take at 20°C. Humidity matters just as much. In experiments exposing male field crickets to low-humidity versus high-humidity environments at constant temperature, males in the low-humidity group lost significantly more water.4PubMed Central. Humidity stress and its consequences for male pre- and post-copulatory fitness traits in an insect
This is why crickets in your garage or basement tend to survive longer than crickets in an open terrarium with a heat lamp overhead. The garage offers cooler air and often higher relative humidity, both of which slow water loss. If you are trying to keep feeder crickets alive, the single most important thing you can do is provide a reliable water source and keep them out of extreme heat. A damp sponge, water crystals, or even a piece of moist fruit will extend their lives far more effectively than extra dry food.
What Happens Inside a Starving Cricket
When food runs out but water is still available, crickets do not simply wind down like a battery draining. Their internal fuel management follows a specific sequence. Research on the Mediterranean field cricket found that carbohydrate reserves are depleted within the first three days of starvation. After that, the cricket shifts to burning stored lipids, which are a more energy-dense fuel source.5Physiological Entomology. Metabolic rate does not decrease with starvation in Gryllus bimaculatus when changing fuel use is taken into account
Here is where crickets do something that surprised researchers. Many animals slow their metabolism during starvation as a survival strategy, conserving energy by essentially running in low-power mode. Crickets do not appear to do this. That same study showed that when you account for the shift from carbohydrate to lipid fuel, crickets starved for seven days had essentially the same metabolic rate as crickets starved for just 24 hours. The raw measurements of carbon dioxide output went down, which looks like a lower metabolic rate, but the drop reflected the switch in fuel type rather than a genuine slowing of the engine. Lipid metabolism produces less CO₂ per unit of energy than carbohydrate metabolism, so the apparent decrease was an accounting artifact.
Research on the sand cricket supports a related finding: fasting does generally lower measurable metabolic variables, but the effect is graded. The more a particular metabolic measurement is influenced by how active the cricket is, the less starvation alone shows up in the data.6PubMed. The effect of fasting on activity and resting metabolism in the sand cricket, Gryllus firmus: a multivariate approach In practical terms, this means a starving cricket that stays still will show a modest dip in resting metabolism, but a starving cricket that keeps moving around (as many do when searching for food) burns through reserves at close to its normal rate. The inability to meaningfully throttle back metabolism likely contributes to why crickets starve to death in one to two weeks rather than stretching things out for months the way some other insects can.
Behavioral Shifts When Resources Run Low
Hungry crickets do not sit quietly and wait. They get more active, more aggressive, and in crowded conditions, they turn on each other. Research on Mormon crickets, which form massive migratory bands in the western United States, showed that the animals cannibalize each other at high rates when protein and salt are scarce. Providing protein and salt reduced cannibalism, and protein alone was enough to stop the insects from marching.7PubMed Central. Cannibal crickets on a forced march for protein and salt
This is directly relevant if you keep crickets in a bin. Overcrowding plus inadequate food equals a rapid population decline, and not just from starvation. Hungry crickets will eat the recently dead, the molting (whose soft new exoskeleton makes them vulnerable), and even live cage-mates. If you return from a few days away to a bin that seems half empty, cannibalism is a more likely explanation than mass starvation. Providing a protein-rich food source such as fish flakes, chicken feed, or commercial cricket diet alongside a moisture source significantly reduces this behavior.
Dehydrated crickets also change their behavior in ways that compound the problem. They become less active in some contexts but more frantic in others, particularly when seeking moisture. You may notice crickets clustering around any damp surface in their enclosure, or attempting to drink from condensation on the walls. This desperation-driven activity further accelerates water loss, creating a vicious cycle.
Why Rehydration Does Not Fully Fix the Damage
A common assumption is that a dehydrated cricket just needs a drink to bounce back. The reality is more complicated. When a cricket loses water, the concentration of salts and ions in its hemolymph spikes. The cricket’s body tries to manage this by moving ions around between compartments, pulling potassium out of cells and shuffling sodium. But once water is restored, the system does not simply snap back to normal.
Research on dehydrated field crickets found that rehydration failed to restore sodium and potassium concentrations to their original levels. About 62% of the sodium that disappeared from the hemolymph during dehydration was excreted rather than reabsorbed, and the cricket dumped five times more potassium than had been removed from the hemolymph during the dehydration period. That excess potassium came from intracellular stores, meaning the cells themselves had been damaged or disrupted during the dehydration event.8Physiological Entomology. Regulation of haemolymph sodium and potassium during dehydration in the cricket Teleogryllus oceanicus
The practical takeaway is that a cricket that has been severely dehydrated and then given water may survive but is probably not in great shape internally. Its ion balance is off, its cells have been stressed, and its reproductive fitness and overall vigor are likely reduced. For feeder-cricket keepers, this means prevention matters more than rescue. Keeping a consistent water source in the bin is far more effective than letting crickets dry out and then trying to revive them.
Life Stage Matters
Nymphs, the immature stages of crickets, are generally more vulnerable to both food and water deprivation than adults. They have a higher surface-area-to-volume ratio, thinner cuticle, and faster relative growth demands. A nymph that runs out of water may die in a day or two rather than the two to four days an adult might last. They also molt regularly, and molting requires adequate hydration because the new exoskeleton must expand and harden properly. A dehydrated nymph attempting to molt can become stuck in its old skin, which is almost always fatal.
Older adults are also more vulnerable than young, healthy adults. A cricket nearing the end of its natural lifespan, which is typically around two to three months for most common species, has fewer energy reserves and less physiological resilience. A healthy young adult in its prime is the most robust against deprivation, and even then, water remains the bottleneck.
Species Variation
The answer also shifts somewhat depending on the species. The house cricket is the one most people encounter, either as a pest or as a feeder insect. It is moderately tolerant of dry conditions but not exceptional. Tropical species adapted to humid rainforest environments tend to be less tolerant of desiccation because they evolved in settings where water was always available. Desert-dwelling cricket species, by contrast, have evolved thicker or waxier cuticles and more efficient water-retention strategies, allowing them to survive longer dry spells.
Banded crickets, increasingly popular as feeder insects because of their slightly smaller size and less aggressive odor, have a reputation among keepers for being somewhat hardier than house crickets in low-humidity conditions, though controlled comparative studies are limited. Black field crickets are larger and may have proportionally more body water to draw on, but their higher overall metabolic demands roughly cancel that out. The differences between common pet-trade species are real but not dramatic. No commercially available cricket species is going to survive weeks without water.
How Cricket Eggs Handle Drought
While adult and nymph crickets are quite vulnerable to drying out, eggs are a different story. Cricket eggs have their own protective mechanisms and can be surprisingly resilient. Related orthopteran insects, such as katydids, use a strategy called diapause, a kind of developmental pause, to survive extended dry periods. Research on katydid eggs showed that eggs in drier conditions were significantly more likely to prolong diapause until after the drought ended, effectively waiting out unfavorable conditions before hatching.9Wiley Online Library (Ecological Entomology). Coping with drought: diapause plasticity in katydid eggs at high, mid‐, and low elevations
Cricket eggs laid in soil similarly have some ability to tolerate dry periods. The egg casing provides a degree of protection, and many cricket species lay eggs in soil deep enough that moisture levels remain more stable than at the surface. This is one reason crickets can persist in environments with unpredictable rainfall. The adults may die during a dry spell, but the eggs in the ground can survive and hatch when conditions improve. For anyone trying to breed crickets at home, this means keeping the egg-laying substrate consistently moist is critical for hatch rates, but a brief dry spell is less catastrophic for eggs than it would be for the adults.
Practical Guidelines for Keeping Crickets Alive
If you are keeping crickets as feeders for reptiles, amphibians, or other pets, the research points to a few clear priorities:
- Water first: Provide a constant moisture source. Water crystals, a damp sponge, or slices of potato and carrot work well. Open water dishes are risky because crickets drown easily.
- Ventilation with humidity: Good airflow prevents mold and ammonia buildup, but too much ventilation in a dry room will desiccate crickets quickly. A partially ventilated lid in a room with at least moderate humidity is the balance to aim for.
- Temperature control: Crickets are most active and eat most at around 27 to 32°C, but higher temperatures also increase water loss. If you cannot maintain reliable moisture, keep the temperature on the lower end.
- Protein in the diet: Dry cricket food, fish flakes, or chicken mash provides protein that reduces cannibalism. Without protein, crowded crickets will eat each other regardless of how much carbohydrate you offer.
- Density management: Overcrowding amplifies every problem. Stress increases, cannibalism rises, ammonia builds up, and water sources get depleted faster.
The difference between a well-maintained cricket colony and a neglected one is stark. A bin with water crystals, decent food, and moderate temperatures can keep crickets alive for their full natural adult lifespan. A dry bin with no water source in a warm room can lose most of its population in under a week, with the first deaths appearing within two to three days from dehydration alone.
Why Crickets Are More Fragile Than They Seem
People sometimes assume insects are universally tough survivors that can go weeks without anything. Certain insects can. Some beetle species in dry environments survive months without food or water. Cockroaches famously last about a month without food (though they also die within a week without water). Crickets, though, evolved as generalist omnivores in temperate and tropical environments where food and moisture were generally available. They did not develop extreme desiccation resistance or the deep metabolic suppression that long-fasting insects rely on. The research showing that crickets do not meaningfully reduce their metabolic rate during starvation underscores this point: they are built to eat frequently and stay hydrated, not to endure prolonged famine.
Their reproductive strategy reflects this too. Crickets invest heavily in fast reproduction, laying hundreds of eggs over a short adult life rather than conserving resources for long-term individual survival. In ecological terms, they are playing a numbers game. If conditions turn bad, the adults die, but the eggs in the soil carry the population forward. The adults themselves are essentially disposable once they have mated and laid eggs, which helps explain why evolution never pressured them into developing the kind of extreme starvation tolerance found in some other insect lineages.