Giant Asian Mantis (Japan)

Giant Asian Mantis (Japan) key facts

Care level

Intermediate

Lifespan

One generation a year; adults from late August to early December on the mainland, year-round in the Nansei Islands

Size

Males 45-65mm, females 52-71mm

Temperature

20〜25℃

Diet

Live insects (crickets, cicadas, butterflies; small fruit flies and aphids for first-instar nymphs)

Temperature & Humidity

Keep at 20-25C; the tolerated range is roughly 15-30C, with 30C as the ceiling. Its bulkier body is said to need more humidity than other Japanese mantises, so mist the ootheca and the case frequently around hatching and before moults.

Breeding & Egg-laying

Mates in autumn, and the female lays a dark, glossy oval ootheca on tree trunks, house walls or concrete-block walls. Glue collected oothecae to a stick, store them outdoors or in a cold room, and as hatching approaches give them light and moderate misting; too little moisture causes hatching failures.

Cohabitation

Carnivorous and cannibalistic, so house singly. It threatens more readily than any other Japanese mantis and moves fast, so guard against escapes when opening the case.

Lifespan & Rearing Period

One generation a year, overwintering as eggs; adults are seen from late August to early December on the mainland. In the Nansei Islands adults occur year-round and grow larger than mainland ones.

Health & Notes

First-instar nymphs are unusually small, and from hatching to about the third instar even Trinidad fruit flies can be too large, so keep the smaller common fruit fly on hand. Watch also for moulting failures, horsehair-worm infection and parasitic wasps that lay into the ootheca. It can be told from the introduced Hierodula chinensis by the tubercles on the fore-coxa. The English name Giant Asian Mantis is also widely used for a different species, Hierodula membranacea, so temperature and size figures published under that name should not be applied to this mantis.

About Giant Asian Mantis (Japan)

The giant Asian mantis is a stocky, mid-to-large mantis with a broad abdomen, white forewing markings, and pale tubercles on its front legs. Arboreal and feisty, it suits intermediate keepers.

7 things to know before welcoming a Giant Asian Mantis (Japan)

1. 1Built for Life in the Trees

   The giant Asian mantis is highly arboreal, spending most of its time up in branches and foliage. Give it climbing perches and leafy branches taller than its body, since it also needs vertical space to molt safely.

2. 2Green or Brown Coloring

   Most individuals are green, but brown-colored specimens turn up as well. Either color form carries the species' distinctive markings, so no two mantises look quite the same.

3. 3Bold and Quick to Bluff

   This mantis has a feisty temperament and will often raise its front legs in a threat display when disturbed. Handle it calmly and gently, since careless handling can result in a pinch from those raptorial forelegs.

4. 4Tiny Nymphs Need Care

   Newly hatched nymphs are extremely small, so choosing appropriately sized feeder insects takes some thought. Getting this early stage right is the main challenge behind the species' intermediate difficulty rating.

5. 5How to Tell It Apart

   Look for the white markings on the forewings and the small pale yellow-white tubercles along the front legs — both are reliable identifiers. Its broad, stocky abdomen also sets it apart from slimmer mantis species.

6. 6When Adults Appear

   This species completes one generation per year. On mainland Japan, adults are typically seen from late August through early December, while in the Nansei Islands adults can be found year-round.

7. 7Setting Up Before Arrival

   Prepare an arboreal setup with climbing branches and misting for humidity before your mantis arrives. Keep individuals housed separately, since mantises are solitary and prone to cannibalizing cage-mates.

Frequently asked questions about Giant Asian Mantis (Japan)

Q.Can beginners keep this mantis?

A.This species is generally considered suited to intermediate keepers rather than complete beginners. The newly hatched nymphs are very small and need careful feeding, so some prior mantis-keeping experience helps.

Q.How long does it live?

A.The giant Asian mantis completes one generation per year. Adults are seen from late August to early December on mainland Japan, while in the Nansei Islands adults can appear throughout the year.

Q.How big do adults get?

A.Males typically reach about 45–65mm, while females grow larger, around 52–71mm. Females also tend to have a stockier build than males.

Q.Is it aggressive, and how should I handle it?

A.It has a bold temperament and readily shows threat displays when disturbed. Move slowly and calmly around it, since its raptorial front legs can pinch if you startle it.

Q.What should I feed it?

A.Nymphs need feeder insects sized to match their small bodies, while adults can take larger prey suited to their size. Since this species is strongly arboreal, placing feeders on branches or leaves helps encourage its natural ambush-hunting behavior.

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