Emperor Flat Stag Beetle
The Emperor Flat Stag Beetle is a large flat stag beetle native to Indonesia, the Philippines, and neighboring regions. Its flattened, sturdy body and the thick inner tooth on the male's mandibles give it a commanding presence on par with the Sumatran flat stag beetle, making it a favorite among keepers of exotic beetles. Adults vary widely in size, from 40 to 100mm, so raising a specimen toward the larger end is part of the appeal. Care is considered fairly stable once the basics are covered, putting it within reach of intermediate keepers, though the powerful mandibles call for careful handling. Adults typically live one to two years, rewarding owners with a long-term companion.
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Emperor Flat Stag Beetle key facts
- Care level
- Intermediate
- Lifespan
- Adult 1-2 years
- Size
- 40-100mm
- Temperature
- 20〜27℃
- Diet
- Tree sap, beetle jelly
- Housing
- Keep in a small to medium case set up with egg-laying logs and fermented substrate. Feed adults beetle jelly.
- Temperature & Humidity
- Maintain 20-27°C. It is relatively stable to keep and easy to manage as long as the substrate does not dry out.
- Larval Care
- Can raise in fermented mat or fungal bottle
- Breeding & Egg-laying
- Eggs are laid in sawtooth or konara oak logs. Adults live a relatively long 1-2 years, giving plenty of breeding opportunities.
- Notes
- Handle with care as large individuals have powerful mandibles
About Emperor Flat Stag Beetle
Emperor Flat Stag Beetle: a large flat stag beetle from Indonesia and the Philippines, prized for its flat body and thick mandibles. Adults reach 40-100mm and live 1-2 years; suited to intermediate keepers.
7 things to know before welcoming a Emperor Flat Stag Beetle
1Intermediate difficulty
The Emperor Flat Stag Beetle is generally considered suitable for intermediate keepers. Learning the basics of temperature and humidity control is enough to keep it fairly stable, so it's worth reviewing beetle-keeping fundamentals before bringing one home if you're new to the hobby.
2Wide range in adult size
Adults vary widely in size, from 40 to 100mm. Larval care has a big influence on the final size, so keepers aiming for a larger adult will want to pay close attention to husbandry during that stage.
3Powerful mandibles
Males have a distinctive large inner tooth on their mandibles, and their grip is strong. Handle them carefully to avoid getting pinched, and avoid forcing contact if the beetle seems reluctant.
4Adults live 1-2 years
As adults, they typically live about one to two years. Consistent care — steady temperatures and regular food changes — helps them stay healthy for that whole span.
5Temperature matters
Being native to tropical regions, this species doesn't tolerate extreme cold or heat well. Keep the enclosure somewhere with stable temperatures and watch for seasonal swings.
6House males separately
Stag beetles are territorial, and males housed together can fight fiercely. Keep one beetle per enclosure as a rule, and use separate containers if you're keeping more than one.
7Prep the setup first
Before bringing one home, have the basics ready: an enclosure, insect substrate, a climbing branch, and a food dish. Having everything set up in advance reduces stress on the beetle when it arrives.
Frequently asked questions about Emperor Flat Stag Beetle
- Q.Is this beetle suitable for beginners?
- A.It's generally considered an intermediate-level species, but keepers new to the hobby can still succeed once they understand the basics of temperature and humidity control. It's a good idea to review beetle-care fundamentals before bringing one home.
- Q.How big do adults get?
- A.Adults range from 40 to 100mm. Size varies between individuals and is also influenced by how the larva was raised.
- Q.How long do they live?
- A.As adults, they typically live about one to two years. Consistent daily care helps them stay healthy for that whole period.
- Q.Can I keep more than one together?
- A.Males are territorial and can fight when housed together, so it's best to keep one beetle per enclosure. If you want to keep multiple beetles, use separate containers.
- Q.Is this species subject to CITES?
- A.The Emperor Flat Stag Beetle is not subject to CITES.
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Learn more about Emperor Flat Stag Beetle in the encyclopedia
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Care difficulty, lifespan, size and diet — all basics covered.
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