Do Praying Mantises Eat Plants? The Truth Revealed

By Priya Sharma · January 24, 2026

Praying mantises do not eat plants; they are strictly carnivorous insects that feed on other insects and small animals. While they may occasionally be seen on vegetation, this is solely for hunting or camouflage—never for feeding.

Understanding the Diet of Praying Mantises

Praying mantises are predatory insects known for their unique appearance and agile hunting skills. A common misconception is that they consume plant matter, especially since they are often found among leaves and flowers. However, mantises lack the digestive system required to process cellulose or other plant materials. Their entire biology is adapted for a meat-based diet.

What Do Praying Mantises Eat?

Fruit flies and gnats (common in juveniles)
Moths and crickets
Spiders and small beetles
Larger prey like hummingbirds or frogs (rare, in big species)
Insect larvae and aphids

Hunting Behavior and Feeding Habits

Mantises rely on stealth and speed to capture prey. They use their powerful raptorial forelegs to snatch insects mid-air or from foliage. Their excellent vision and ability to rotate their heads 180 degrees give them a significant advantage as ambush predators.

Myths About Plant Consumption

Some gardeners report seeing mantises near fruits or vegetables and assume they are feeding. In reality, these observations typically involve:

Mantises using plants as hunting grounds
Incidental contact while moving between perches
Dehydration-induced sipping of dew or plant sap (not consumption of tissue)

Prey Type	Average Consumption (per week)	Frequency Observed (%)	Mantis Life Stage
Fruit Flies	15–20	92%	Nymph
Crickets	3–5	78%	Adult
Moths	2–4	65%	Adult
Aphids	30+	41%	Nymph
Spiders	1–2	53%	Subadult

Table data source:1, 2

The data shows that praying mantises primarily consume live prey, with nymphs targeting smaller, more abundant insects like fruit flies and aphids. Adults shift toward larger prey such as crickets and moths. Notably, no plant material appears in dietary records, confirming their obligate carnivory.

Implications for Gardeners and Pest Control

Gardeners often introduce mantises to control pests. While effective against aphids, mites, and caterpillars, it's important to understand they won't harm plants. However, they also don't discriminate between pest and beneficial insects, sometimes preying on pollinators like bees.

Best Practices for Using Mantises in Gardens

Use egg cases (oothecae) early in spring
Provide diverse vegetation for cover and hunting
Avoid chemical pesticides that can poison mantises indirectly
Supplement with live prey if natural populations are low

Frequently Asked Questions About Praying Mantis Diets

Do praying mantises eat leaves or flowers?

No, praying mantises do not eat leaves or flowers. They may rest on them for camouflage or hunting but derive no nutritional value from plant tissues.

Can I feed a pet mantis lettuce or fruit?

No, never feed plant-based foods to a pet mantis. They require live insects such as fruit flies, crickets, or mealworms for proper nutrition.

Why do mantises sit on tomato plants?

Mantises use tomato plants as strategic hunting locations where pests like aphids and whiteflies gather. They are waiting to ambush prey, not eating the plant.

Are praying mantises harmful to my garden?

Generally, they are beneficial as they eat many pests. However, they may also consume beneficial insects like ladybugs or bees, so their impact should be monitored.