Most praying mantises live between 6 and 18 months from hatching to natural death. Females consistently outlive males, often by several months. The exact lifespan depends heavily on species, temperature, feeding frequency, and sex — with larger species and cooler temperatures generally producing longer lives.
Lifespan comparison by species
Here’s the breakdown for the six species we breed at Lobo Mantis:
| Species | Total Lifespan | Female Lifespan | Male Lifespan | Instars (Female/Male) | Adult Lifespan |
|---|---|---|---|---|---|
| Orchid Mantis | 5-9 months | 7-9 months | 5-6 months | 8/6 | 2-3 mo (F) / 2-4 wk (M) |
| Ghost Mantis | 7-12 months | 10-12 months | 7-10 months | 7/6 | 3-5 months |
| Spiny Flower Mantis | 8-11 months | 9-11 months | 8-9 months | 7/6 | 3-4 months |
| Dead Leaf Mantis | 8-13 months | 10-13 months | 8-10 months | 8/7 | 3-5 months |
| African Twig Mantis | 8-12 months | 10-12 months | 8-10 months | 8/7 | 4-7 months |
| Double Shield Mantis | 12-18 months | 14-18 months | 12-14 months | 8/7 | 4-6 months |
A few standouts worth noting: Double Shield Mantis has the longest lifespan of any species we work with, regularly hitting 18 months for well-kept females. On the other end, Orchid Mantis males have the shortest adult phase — sometimes just 2-4 weeks after their final molt. This is relevant if you’re planning to breed, because the timing window between male and female maturity is tight. (If you’re still choosing your first mantis, our praying mantis buying guide walks through what to look for.)
Why females live longer than males
This isn’t just a minor difference — it’s a consistent pattern across all mantis species. Female mantises live longer for three overlapping reasons:
More instars. Females go through more molts than males before reaching adulthood. Each additional instar adds time to their development. An Orchid Mantis female has 8 instars versus 6 for males — that’s an additional growth period.
Larger body mass. More instars means larger adult size, and larger mantises simply have more metabolic reserves. A female Orchid Mantis is more than twice the size of the male.
Reproductive investment. Females need to stay alive long enough to produce oothecae (egg cases) after mating. Evolution has selected for longer female lifespans because dead females produce no offspring. Males only need to survive long enough to mate — and they often don’t survive much beyond that.
What affects praying mantis lifespan
Beyond species and sex, several factors within your control influence how long your mantis lives.
Temperature
This is the single biggest environmental factor. Mantises are ectotherms — their metabolism runs on ambient temperature. Warmer temperatures speed up their metabolism, which means faster growth, faster molting, and a shorter total lifespan.
Keeping a mantis at the high end of its temperature range (say, 85F for a species that tolerates 75-85F) will push it through its instars faster and shorten its life. Keeping it at the low-moderate end (75F) slows development and extends total lifespan by weeks or even months.
This is not a trick to make them “live longer” — it’s a trade-off. Slower development means slower growth and longer wait times between molts. But if you want to maximize time with your mantis, running slightly cooler (within the safe range) is the lever you have.
Check the species-specific care guide for recommended temperature ranges: Orchid Mantis care, Ghost Mantis care, Spiny Flower Mantis care, Dead Leaf Mantis care, African Twig Mantis care, Double Shield Mantis care.
Feeding frequency
Overfeeding accelerates growth. A mantis that eats every day will molt faster, reach adulthood sooner, and die sooner. This is especially pronounced in males, who can rush through their instars in a fraction of the time if kept warm and overfed.
I recommend feeding every 2-3 days for nymphs and every 3-4 days for adults. This mimics a more natural feeding rhythm and produces healthier, longer-lived animals. If you’re new to keeping mantises, start with our getting started care guide for the husbandry fundamentals. An overfed female will produce more oothecae but may burn out faster. An overfed male will mature weeks ahead of females from the same clutch, creating breeding timing problems.
Species genetics
Some species are simply longer-lived regardless of conditions. Double Shield Mantis is the marathon runner of the mantis world — it grows slowly, molts more times, and takes its time reaching adulthood. It’s ideal if you want a pet mantis that sticks around, and it’s one of our top picks in the best pet mantis for beginners guide for exactly that reason.
Orchid Mantis, particularly males, are sprinters. They mature fast, they’re small, and their clock is ticking from the moment they reach adulthood. This doesn’t make them bad pets — it means you should know what you’re signing up for.
Mismolts and injury
A significant number of captive mantises die from molting complications rather than old age. A bad molt — caused by low humidity, inadequate perching surfaces, disturbance during molting, or genetic factors — can be fatal or leave a mantis unable to hunt.
Proper husbandry dramatically reduces mismolt risk. Maintaining appropriate humidity, providing textured surfaces for gripping, and never disturbing a molting mantis are the basics. See our molting problems guide for the full breakdown.
Life stages and what to expect
Understanding the timeline helps you know what’s coming:
L1-L3 (weeks 1-6): Rapid growth, frequent molts (every 7-14 days), tiny size, fruit fly feeders. This is the most vulnerable period. In the wild, the vast majority of nymphs die before reaching adulthood.
L4-L6 (weeks 6-14): Growth slows slightly, molts space out to every 2-3 weeks. The mantis is establishing its adult shape and coloration begins to show. Feeders move up to house flies and small prey.
L7-adult molt (weeks 14-24): The final instars. Sub-adult mantises develop wing buds visible through the exoskeleton. The final molt produces wings (in winged species) and marks sexual maturity.
Adult phase (final 2-6 months): No more molting. The clock is now fixed. Females will mate and produce oothecae. Males will actively seek mates. This is when the sex-based lifespan difference becomes dramatic — males decline noticeably within weeks of their final molt, while females remain active and hunting for months.
Maximizing your mantis’ lifespan
If you want the longest possible relationship with your mantis:
- Choose a long-lived species. Double Shield Mantis or African Twig Mantis give you the most time.
- Choose a female. Across the species we breed, females typically live 20-40% longer than males.
- Keep temperatures moderate. Don’t cook them at maximum heat. Stay in the middle of the acceptable range.
- Feed consistently but don’t overfeed. Every 2-3 days for nymphs, every 3-4 for adults.
- Prevent mismolts. Proper humidity, good perching surfaces, zero disturbance during molts.
Even with perfect care, a mantis is a short-lived pet. That’s part of what makes them rewarding — you experience their entire life cycle, from tiny nymph to full adult, in under a year. It’s a complete relationship compressed into a manageable timeframe.
Browse our available species to find your next mantis, and check the individual care guides for species-specific husbandry that supports a healthy, full lifespan.