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Dorcus bucephalus
A large flat stag beetle found in Indonesia, Philippines, and surrounding areas. Has a presence rivaling the Sumatran giant flat stag, with flattened body and large inner teeth. Relatively stable to keep and a popular exotic species.
Dorcus bucephalus is a large flat stag beetle distributed in Indonesia, notably Java. It features a flattened body, well-developed mandibles, and prominent inner teeth, giving it a robust appearance comparable to the Sumatran giant flat stag. Captive care is relatively stable, using a small to medium enclosure with oviposition logs and fermented substrate. Adults are fed insect jelly, and females lay eggs in hardwood logs such as oak. Larvae reared in fungal substrate bottles or fermented substrate can yield large individuals. With a relatively long adult lifespan and powerful mandibles, it is a popular exotic flat stag beetle.
Source: Wikipedia (CC BY-SA 4.0)
Origin
Indonesia (notably Java)
Lifespan
Adult 1-2 years
Size
40-100mm
Temperature
20〜27℃
Humidity
60〜80%
Tree sap, beetle jelly
Maintain 20-27°C
Captive record (♂)
91.6 mm
Wild record (♂)
90 mm
Record source: BE-KUWA 2025年度版(ダイオウ 飼育91.6mm 渡辺晴夫 2014 / 野外90.0mm)
Notable localities
飼育レコードは BE-KUWA(むし社)のコンテストで毎年更新される。産地・累代(CBF/WF/WD)・サイズで個体価値が大きく変動する。
Generation codes
Sources: BE-KUWA 認定飼育レコード(むし社、2025年度版)
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Dorcus bucephalus (Perty, 1831)
Synonyms: Dorcus bucephalus, Dorcus axis Dejean, 1836, Dorcus goliathus Gistel, 1850, Dorcus lateralis Dejean, 1836, Dorcus punctifrons Sturm, 1843, Dorcus urus Dejean, 1836, Lucanus bilunatus Burmeister, 1847, Lucanus bubalus Perty, 1831, Lucanus bucephalus Perty, 1831, Lucanus latus Burmeister, 1847, Lucanus rugifrons Hope, 1845, Lucanus subcostatus Sturm, 1826
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
Plant Protection Act: コガネムシ上科(カブトムシ・クワガタムシ・ハナムグリ等)の生きた個体を輸入する際は、外来生物法に基づき輸出国政府機関等が発行する種類名証明書の添付が必要(輸入港は成田・中部・関西・福岡・鹿児島の各空港に限定)。本種自体は特定外来生物ではなく、証明書の添付により輸入可能。
Sources: 環境省 外来生物法「コガネムシ上科に含まれる生きた昆虫を輸入される方へ」 / CITES 附属書(checklist.cites.org)
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
Can raise in fermented mat or fungal bottle
Adapts to logs or mat for egg laying
Handle with care as large individuals have powerful mandibles
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Emperor Flat Stag Beetle is 20〜27℃. Recommended humidity is 60〜80%. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Emperor Flat Stag Beetle is Adult 1-2 years. With proper care and nutrition, they can live a long and healthy life.
Emperor Flat Stag Beetle typically reaches 40-100mm as an adult. Size may vary depending on care conditions and individual genetics.
Emperor Flat Stag Beetle feeds on: Tree sap, beetle jelly. Aim for a balanced diet with appropriate feeding frequency.
The price of Emperor Flat Stag Beetle varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026