Canaliculatus Long-jawed Stag Beetle

Canaliculatus Long-jawed Stag Beetle key facts

Care level

Intermediate

Lifespan

Adults 4-6 months (typical for the genus)

Size

Males 23.6-58.3 mm (nominate subspecies; captive record 58.3 mm, wild record 56.2 mm)

Diet

Beetle jelly (in the wild it visits flowers of herbaceous plants)

Temperature & Humidity

Cyclommatus above all dislike stale, humid air. Condensation inside the box is the worst case and shortens life, so keep the container somewhere cool and out of direct sun, and use newspaper or a well-perforated sheet under the lid for ventilation. Mist the substrate when the surface dries out.

Breeding & Egg-laying

Soak a soft log of oak or similar, about 10 cm across, for two hours to a day and strip the bark. Pack 3-5 cm of fine-grained fermented substrate hard in the base, lay the log on it and bury it completely. A female in good condition lays 20-30 eggs. Collect the larvae early, because they cannibalise each other if left too long.

Cohabitation

Keep singly. Hand pairing works once the beetles are mature and mating is easy; the female is far smaller than the male but pairs without trouble. The genus is fairly placid, but females are occasionally killed, so move the male to his own container once mating is confirmed.

Lifespan & Rearing Period

Adults live about four to six months, and larger males live longest. Larvae take three to six months for females and three to ten months for males. Feeding begins two to five weeks after emergence, so wait until the beetle is eating before pairing it.

Health & Notes

Fungus bottles are unsuitable and larvae die in ordinary mycelium. Pack fermented substrate to 80-90 per cent of the container and change it every two to three months. The main reason lines are lost is that the sexes emerge out of step, so deliberately raise some small males to match the females.

About Canaliculatus Long-jawed Stag Beetle

The Canaliculatus Long-jawed Stag Beetle, native to the Sumatra region, is known for its grooved elytra and the male's long, slender mandibles. Divided into five regional subspecies, it suits intermediate-level keepers.

7 things to know before welcoming a Canaliculatus Long-jawed Stag Beetle

1. 1Five Subspecies, Five Looks

   This beetle is split into five subspecies by locality, each with its own body shape and coloring. Check the locality listed before bringing one home if you have a particular look in mind.

2. 2Handle the Jaws with Care

   The male's long, slender mandibles are the beetle's main draw, but that same slenderness makes them fragile. Set up an enclosure where it won't thrash around, and always handle it gently.

3. 3Adults Live About 4-6 Months

   As with the genus generally, adult activity typically lasts around four to six months. Keeping temperature and humidity stable helps the beetle make the most of that limited window.

4. 4Suited to Intermediate Keepers

   This species calls for some working knowledge of temperature and humidity control. First-time keepers may want to build experience with an easier stag beetle before taking one on.

5. 5Substrate and Footholds

   Adults do well with a moisture-retentive insect substrate plus bark or a perch so they can right themselves if they tip over. Aim for an environment that never dries out completely.

6. 6Watch Day-Night Swings

   Native to the warm, humid Sumatra region, this species doesn't tolerate sudden cold snaps or dryness well. Keep the enclosure away from direct sun and air-conditioning drafts.

7. 7Males Vary Widely in Size

   Male adults range from 23.6mm to 58.3mm, with real variation even within the same subspecies. Consider mandible shape and overall balance, not just size, when choosing one.

Frequently asked questions about Canaliculatus Long-jawed Stag Beetle

Q.How difficult is this beetle to keep?

A.It's considered suited to intermediate keepers. Having some background in temperature and humidity management makes the transition smoother, and first-timers may want to start with an easier species.

Q.How long do the adults live?

A.Adult activity typically lasts around four to six months, as is typical for the genus. This varies by individual and environment, so keeping temperature and humidity stable helps.

Q.How long can the male's mandibles get?

A.Males of the nominotypical subspecies range from 23.6mm to 58.3mm, with a captive-bred record of 58.3mm and a wild record of 56.2mm. Individual variation is significant, so it's worth weighing overall body balance alongside size.

Q.Do the subspecies look different from one another?

A.Yes — the species is divided into five subspecies by locality, with differences in body shape and coloring. Checking the locality listed can help you choose the look you prefer.

Q.Are there any legal restrictions on keeping this species?

A.The Canaliculatus Long-jawed Stag Beetle is not subject to CITES.

Useful tools for Canaliculatus Long-jawed Stag Beetle care

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