Learn how mantis diets change with size, why they eat beneficial insects too, and what their presence can and cannot do for garden pests.
Mantises are generalist predators
Praying mantises, also called mantids, mainly hunt insects and other small prey. They do not select only the species a gardener wants removed. Their diet depends on the mantis species, body size, available prey and opportunity. A mantis on a plant is using it as hunting habitat; its presence does not establish that the plant’s pest problem is controlled.
Grasping front legs, a mobile head and camouflage support their hunting. Instead of pursuing every insect over a large area, mantises often wait among vegetation and seize prey that comes within reach. Their ability to catch varied prey makes them interesting predators, but it does not provide a predictable household or garden eradication service.
Eggs, nymphs and adults: size changes the prey opportunities
Mantises develop from eggs in a protective egg case through nymph stages to adulthood. Nymphs resemble smaller adults and grow through molts; fully developed wings are an adult feature in winged species. Species and local conditions affect development, so a seasonal calendar for a Kentucky species should not be applied to every Florida mantis.
Small nymphs can capture smaller arthropods, while larger nymphs and adults can handle a wider range of insects. This is a size relationship rather than a fixed age-to-prey table. A small mantis cannot be assumed to take every adult beetle or large grasshopper, and a large mantis does not need every prey category listed in a general guide. Availability and opportunity still matter.
An egg case is also not a guaranteed army of pest-control agents. Individuals may disperse or eat one another. Buying or releasing mantises therefore cannot establish a predictable reduction in a particular pest population.
For young nymphs, the University of Kentucky gives fruit flies, pinhead crickets and other small insects as feeder examples. As a nymph grows, larger prey can be provided. Wing buds develop through the molts, with fully developed wings marking adulthood. This concrete size relationship is more useful than assigning one fixed feeder menu to every numbered instar of every mantis species.
Garden prey: pests and beneficial insects share the menu
Flies, moths, crickets, grasshoppers, beetles, caterpillars and other accessible insects can be prey. Small soft-bodied insects may be taken when size and encounter fit, but a mantis should not be expected to clear every aphid colony. Mosquitoes can also be caught opportunistically; a mantis is not a substitute for managing mosquito breeding and exposure.
Bees, other pollinators, predatory insects and other mantises may be eaten too. Wasps and spiders can also appear in a generalist predator’s encounters, but the ability to capture a particular insect is not a reason for people to collect or handle stinging or unfamiliar prey. UF/IFAS emphasizes that mantises consume beneficial insects as well as pests.
Identify the plant pest and damage before deciding on a response. A mantis sitting on oleander does not establish control of its caterpillars, and an occasional beetle catch does not establish predictable control of seasonal beetle populations. Plant-specific monitoring and suitable management remain necessary.
The prey menu includes both garden pests and useful insects. Aphids remove plant sap, while grasshoppers and caterpillars chew foliage; a mantis taking one of them is different from evidence that it controls the whole plant infestation. University of California extension describes flies, mosquitoes, moths, cockroaches, wasps and spiders among potential prey. Chinese mantid guidance also documents spiders and larger insects. Their generalist feeding includes pollinators and other beneficial insects, so observing a mantis is not a selective mosquito or wasp-control program.
Read the original six garden-prey categories by both insect and life stage. Aphids suck plant sap and can distort growth; grasshoppers chew leaves and flowers. Caterpillars are moth or butterfly larvae, with plant damage depending on species—for example, oleander caterpillars can strip leaves. Beetles likewise vary: Colorado potato beetle larvae and adults feed on foliage, while some click-beetle larvae feed on seeds or roots. A moth adult and its plant-feeding larva are different potential encounters. Flies may be caught too, but not every fly is a crop pest or disease carrier. This comparison explains why recognizing the actual plant injury matters; it supplies no High/Moderate mantis-control rating and does not assign every prey category to every nymph size.
Plant-feeding caterpillars can damage fruit as well as leaves, depending on species. UF describes tomato hornworm, Manduca quinquemaculata, feeding on green developing tomatoes in addition to defoliating its nightshade hosts; its guide notes tobacco hornworm is more often the Florida tomato culprit. A mantis taking insect prey is a different feeding role. Inspect the caterpillar, host plant, chewed foliage and actual fruit injury rather than assuming every caterpillar eats fruit or that one mantis will prevent the damage.
When reviewing insect-control product choices, consider the identified pest, label and beneficial insects present rather than applying a broad treatment because one mantid was seen. Identify house flies when investigating indoor flies rather than relying on a garden predator.
The stored-product weevil control guide addresses pantry sources; a garden mantid is not a control plan for insects inside stored food.
The springtail identification guide addresses a separate identification question from the mantid feeding question. Use plant-specific aphid management; generalist mantid predation cannot guarantee removal of an aphid population.
Use oleander caterpillar identification to identify plant damage before assuming a mantid will provide adequate control. Home exclusion and sanitation serve a different role from outdoor predation.
Ambush hunting and why appetite has no universal quota
Camouflage and patient positioning let a mantis wait near flowers or foliage where prey passes. When it captures an insect, the grasping legs hold it while it feeds. A dramatic observation describes one encounter; it does not establish a universal strike speed, daily prey count or lifetime total.
Prey size and the mantis species matter when interpreting feeding. The guidance here does not establish a universal daily feeding quota. A mantis may feed actively at one observation and remain still at another. Do not use one unfed interval to infer that every wild mantis needs help, warming, water dishes or supplied prey. Leave wild individuals and egg cases undisturbed and observe their habitat without handling them.
After its spined front legs seize and hold prey, a mantis begins consuming it with chewing mouthparts. This is the physical feeding step described by Wisconsin extension; grasping legs capture and restrain, while mouthparts do the eating. Camouflage, prey movement, size and opportunity explain an encounter without establishing a fixed daily appetite.
Unusual prey and cannibalism need proportion
Cannibalism can occur, including encounters between potential mates and among younger individuals. It is not an inevitable step after every mating or a universal percentage that applies to all species and conditions. The behavior is another reason that mantis numbers alone do not translate directly into targeted pest-control results.
UF/IFAS reports occasional hummingbird predation. Wisconsin extension also describes some large tropical mantids taking lizards, frogs and even hummingbirds. These unusual observations are not an ordinary menu for every garden mantis. Fish and snakes should not be treated as ordinary prey or recommended captive feeders. Most useful diet discussion concerns insects and other small arthropod prey. Do not capture wildlife to stage a photograph or test what a mantis can eat.
Captive mantises: a species-specific care question
A legitimately kept captive mantis needs a husbandry plan matched to its species, size and life stage. A general garden-pest article cannot set a reliable feeding interval or feeder-size ratio for every animal. Molting, behavior and health need to be considered with a knowledgeable husbandry source or appropriate specialist.
Flies, moths or crickets may appear in captive-diet discussions, but they should not be presented as an interchangeable fixed schedule. Do not collect stinging insects, offer vertebrates, move a wild mantis indoors or prepare food for wildlife based on a broad prey list. The descriptive wild diet is not a feeding protocol.
Feeding young captive mantises starts with small prey such as fruit flies or pinhead crickets for young nymphs and moves toward appropriately larger insects as the mantis grows. Flies, moths and crickets are examples in extension diet accounts, not a guarantee that each is appropriate for every captive species. Match prey and enclosure care to the identified species; the published young-nymph examples do not establish universal L1–L6 schedules, a feeder-to-body ratio or one feeding interval for all pet mantises.
Feeding frequency needs a named captive-care scope. A published husbandry study reared named species such as Stagmomantis limbata from nymphs to adults in the laboratory and described feeding to satiation twice weekly under its controlled room and prey conditions. Chinese mantises (Tenodera sinensis) in that study were obtained as adults, so their inclusion does not document rearing Chinese nymphs on that schedule. That is a documented example rather than a daily quota for every species or home enclosure; the study’s later fasting period was part of an experiment, not routine care advice. The AES care sheet recommends small live insects for young mantids and increasing prey size as they grow, with uneaten crickets and similar prey removed or managed so they do not injure the mantid. Use the identified species’ husbandry plan and observe actual prey consumption and development before setting its schedule. Do not feed a wild mantis or release captive animals to test a pest-control claim.
For a small-to-larger captive-feeder comparison, the AES care sheet begins with fruit flies, aphids or other small insects for young mantids, then lists larger prey such as bluebottle flies, crickets and cockroaches as they grow. The study discussed above also used larger cockroach prey for older individuals of named species under controlled husbandry. These examples retain the size comparison without making every feeder suitable for every mantis or assigning a universal instar calendar. Match prey type and size to the identified captive species and its care guidance, and promptly remove uneaten prey that could injure the mantid; AES specifically warns about crickets, grasshoppers and cockroaches chewing legs or wings. This is captive-care context, not a recommendation to catch or release outdoor animals.
Include feeder sourcing in the captive-care plan. Lobo Mantis’s published feeding guide excludes wild-caught insects because of uncertain pesticide exposure; this is a breeder’s husbandry policy, not a quantified toxicity estimate for every prey insect. For the identified captive species, select appropriate purpose-reared feeders and ask the supplier how they were cultured and whether insecticide exposure is known. Resolve an uncertain exposure history with a knowledgeable husbandry specialist before offering that feeder, rather than treating a live insect or a washing step as proof that it is suitable. Keep the prey-size and live-food care requirements in the species plan; do not collect stinging insects. For product decisions around the habitat, review the chemical-versus-natural insect-control product comparison for product classes, residues, pollinator risks and label precautions. The feeder-sourcing policy above is separately attributed to Lobo Mantis.
Garden value and household pest limits
Mantises contribute to a varied garden community, but their overall value as a deliberate pest-control release is limited. They do not distinguish damaging insects from beneficial ones and can disperse or eat one another. Preserve varied vegetation and make pest decisions from identified damage rather than spraying every insect near a mantis.
If a plant problem needs treatment, choose a product or nonchemical method appropriate to the identified pest and site, with beneficial insects in mind. Avoid broad pesticide use solely because predators are absent or present. A mantis does not certify that a garden is pest-free.
Pantry weevils, indoor flies, springtails, clover mites and unfamiliar scorpions have their own habitats and management questions. Outdoor predation does not locate a pantry source, repair a moisture condition or seal an entry route. Use sanitation, habitat repair and species-specific assessment for those problems rather than treating a garden mantis as a household control plan.
Vegetation provides the foliage in which mantises blend in, wait or slowly stalk prey, and twigs can carry their egg cases. Observe those stages before pruning or applying an insecticide. Identifying leaf-chewing damage, sap-feeding insects and beneficial predators separately helps choose plant care without mistaking every insect on the plant for the cause of damage. Retaining a mantis in a garden does not replace species-specific pest assessment.
For clover mite control, address the actual species and entry conditions instead of expecting an outdoor mantid to clear an indoor invasion.
A mantid’s occasional catch cannot establish predictable control of the broader June beetle population.
Frequently Asked Questions
-
Do praying mantis eat mosquitoes?
They can catch mosquitoes opportunistically, but that does not establish dependable mosquito control. Their prey depends on size and encounters, and they do not target only mosquitoes. Manage the actual mosquito problem rather than relying on one garden predator.
-
Can a praying mantis eat a wasp or bee?
Yes, beneficial insects such as bees and other predatory insects can be taken. Mantises are generalists, not selective pest hunters. Do not collect or handle stinging insects to provide prey or stage a feeding demonstration.
-
How often does a praying mantis need to eat?
For an identified captive mantis, use its species and stage-specific care plan. One published husbandry study reared named species such as Stagmomantis limbata from nymphs to adults in the laboratory and described feeding to satiation twice weekly with suitable prey in controlled conditions. Its Chinese mantises (Tenodera sinensis) were obtained as adults; their inclusion does not document Chinese-nymph feeding on that schedule. That is a real feeding-frequency example, not a universal timetable or instruction to copy experimental fasting. The AES care sheet recommends small prey for young mantids, larger prey as they grow, and preventing uneaten prey from chewing the mantid. Check actual feeding and development with the keeper’s plan rather than assuming every numbered instar needs the same daily ration. Wild mantises should be observed without supplying food or moving them indoors.
-
Do praying mantis eat plants or vegetation?
Their ordinary feeding role is predation on animals, especially insects; they are not the usual explanation for chewed leaves or sap-feeding plant damage. Extension accounts describe moths, flies, beetles, crickets and grasshoppers as prey. That describes the normal diet without asserting that every mantis species can never consume any plant-derived material. Identify the insect and the actual plant damage separately.
-
Is it true that female praying mantis eat the male after mating?
Cannibalism can occur around mating, but it is not inevitable after every mating and no one percentage applies to all species or settings. Mantises can also prey on other mantises outside mating encounters.
-
Are praying mantis good for pest control in my garden?
They can take garden pests, but they also eat beneficial insects and other mantises. Releases do not provide predictable eradication of one pest. Monitor actual plant damage and use suitable species-specific management while preserving beneficial habitat.
Discuss your pest concern
Tell us what you are seeing and where. Our team can discuss the concern and available next steps.
Where can we reach you?
Our team will call to confirm the next step.
By submitting, you’re asking On Demand Pest Control to contact you about this request.
Prefer to call? (954) 947-0805