Zuber's Long-jawed Stag Beetle

Zuber's Long-jawed Stag Beetle key facts

Care level

Advanced

Lifespan

Adults 4-6 months (typical for the genus)

Size

Males 30-73.0 mm (wild record 73.0 mm; the captive record is 64.3 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 Zuber's Long-jawed Stag Beetle

A long-jawed stag beetle native to Luzon through Mindanao in the Philippines, known for males' elongated mandibles (wild record: 73.0mm). Recommended for experienced keepers; adults live about four to six months.

7 things to know before welcoming a Zuber's Long-jawed Stag Beetle

1. 1Best Suited to Experienced Keepers

   Zuber's Long-jawed Stag Beetle is considered a species best suited to experienced keepers, since it calls for careful management of temperature and humidity. If you're new to keeping stag beetles, it's a good idea to build up some foundational experience before taking this species on.

2. 2Males' Long Mandibles Are the Highlight

   Males are known for mandibles that grow disproportionately long relative to their body, with wild specimens recorded up to 73.0mm. This impressive mandible growth is thought to depend on adequate nutrition and favorable conditions during development.

3. 3Captive Size Trails Wild Records

   While wild individuals have been recorded at up to 73.0mm, the captive-bred record stands at just 64.3mm. This gap suggests that matching wild-level size in captivity is not straightforward for this species.

4. 4Limited Captive-Breeding Data

   Information on multi-generational captive breeding of this species is still limited. Anyone attempting to breed it should expect some trial and error, and it helps to keep careful records along the way.

5. 5Adult Lifespan: About 4–6 Months

   Adults typically live for around four to six months. Since this window is relatively short, it's worth having your care setup ready in advance so you can make the most of the time you have together.

6. 6Ranges from Luzon to Mindanao

   This species is native to the Philippines, ranging widely from Luzon to Mindanao. Because of this broad range, individuals can vary noticeably in mandible shape and size.

7. 7Prepare Your Setup Before Bringing One Home

   Because this is a species for experienced keepers, it's important to prepare your enclosure along with temperature and humidity control equipment before bringing one home. Regular observation will also help you notice any changes in condition early.

Frequently asked questions about Zuber's Long-jawed Stag Beetle

Q.How large does this species get?

A.Males typically range from 30 to 73.0mm, with wild-caught specimens recorded at up to 73.0mm. The captive-bred record, however, is only 64.3mm, showing that matching wild size in captivity isn't easy with this species.

Q.Is this species suitable for beginners?

A.Zuber's Long-jawed Stag Beetle is considered a species for experienced keepers. It calls for a certain level of knowledge and hands-on experience with stag beetle care, so newcomers may want to start with an easier species first.

Q.How long do adults live?

A.Adults generally live for around four to six months, as a rough guideline for the genus. Since this lifespan is relatively short, it helps to have your care setup ready before bringing one home.

Q.Can this species be bred across generations?

A.Breeding is possible, but information on multi-generational captive breeding of this species remains limited. Anyone attempting it should be prepared for some trial and error and should keep careful records.

Q.What should I prepare before bringing one home?

A.Because this is a species for experienced keepers, it's important to have an enclosure with temperature and humidity control ready in advance. After bringing your beetle home, regular observation will help you catch any changes in its condition early.

Useful tools for Zuber's Long-jawed Stag Beetle care

Learn more about Zuber's Long-jawed Stag Beetle in the encyclopedia

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