Lunifer Long-jawed Stag Beetle

Lunifer Long-jawed Stag Beetle key facts

Care level

Intermediate

Lifespan

Adults 4-6 months (typical for the genus)

Size

Males up to 55.2 mm (captive record; the wild record is 53.3 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 Lunifer Long-jawed Stag Beetle

A small Cyclommatus stag beetle from Borneo, Sumatra, and the Malay Peninsula, known for its curved mandibles and 55.2mm captive record. Best for intermediate keepers; sensitive to humidity, with a 4–6 month adult lifespan.

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

1. 1Sensitive to Humidity

   This species is sensitive to stuffy, poorly ventilated conditions rather than simply high humidity. Make sure the enclosure has adequate airflow and avoid letting the substrate stay overly damp for long periods, as trapped moisture can affect the beetle's condition.

2. 2Handling the Long Mandibles

   Males are known for their long, gracefully curved mandibles, part of the beetle's visual appeal. Because these jaws are relatively delicate, handle the beetle carefully when moving it in and out of the enclosure and avoid letting individuals come into contact with each other.

3. 3Small for the Genus

   Within the Cyclommatus genus, this is one of the smaller species — the captive-bred record for males stands at 55.2mm, compared with a wild record of 53.3mm. If you picture one of the genus's larger species, the actual size may come as a surprise.

4. 4Adult Lifespan: 4–6 Months

   As an adult, this beetle typically lives around four to six months, based on genus-level estimates. That is a relatively short window to enjoy it as an adult, so it helps to appreciate the day-to-day changes once it arrives.

5. 5Why It's Intermediate-Level

   Overall care difficulty is considered intermediate. Compared with easier beginner species, there are more environmental factors to manage, such as guarding against stuffy conditions and handling the delicate mandibles with care, so some prior beetle-keeping experience helps.

6. 6Tropical Temperature Needs

   Originating from tropical Borneo, Sumatra, and the Malay Peninsula, this species does not tolerate extreme cold well. At the same time, since it is also sensitive to stuffy conditions, keepers need to balance warmth with adequate ventilation rather than focusing on temperature alone.

7. 7Preparing Before Arrival

   Before bringing one home, prepare a well-ventilated enclosure and suitable substrate. Given this species' sensitivity to stuffy conditions, it also helps to check in advance that the intended location has good airflow and stable temperatures, which makes ongoing care easier.

Frequently asked questions about Lunifer Long-jawed Stag Beetle

Q.How big does the Lunifer Long-jawed Stag Beetle get?

A.The captive-bred record for males is 55.2mm, making it one of the smaller species in the Cyclommatus genus. The wild record is reported as 53.3mm.

Q.How long does the adult beetle live?

A.As an adult, this beetle typically lives around four to six months, based on genus-level estimates. Its total lifespan, including the larval stage, is longer than that.

Q.Is this beetle suitable for beginners?

A.Care difficulty is considered intermediate. Because it is sensitive to stuffy conditions and needs careful ventilation management, it is best suited to keepers with some prior beetle-keeping experience.

Q.What kind of environment does it need?

A.Since it comes from a tropical region, avoid extreme cold while ensuring good airflow to prevent stuffy conditions. Manage the substrate so it does not stay overly damp for long periods.

Q.Are there any legal regulations on keeping or selling it?

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

Useful tools for Lunifer Long-jawed Stag Beetle care

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