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Didier's Stag Beetle
IntermediateRhaetulus didieri
A species of Rhaetulus stag beetle distributed in Vietnam and southern China. Features uniquely shaped mandibles reminiscent of deer antlers, with a black glossy body. Relatively easy to handle and popular as an entry-level exotic stag beetle.
Difficulty
Intermediate
Temperature
20〜26℃
Lifespan
Adult 6mo-1yr
Size
30-70mm
Humidity
60〜80%
Diet
Tree sap, beetle jelly
About
Rhaetulus didieri is a deer stag beetle distributed across Vietnam and southern China. It features distinctive antler-like mandibles and a glossy black body. Relatively easy to handle, it is popular as an introductory exotic stag beetle. Husbandry uses a small to medium enclosure with oviposition logs and fermented substrate. Adults are fed insect jelly, and larvae can be reared in fungal substrate bottles or fermented substrate. Maintaining moderately high humidity keeps it stable. Combining a distinctive mandible shape with ease of care, it suits those keeping deer stag beetles for the first time.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
Vietnam and southern China
Lifespan
Adult 6mo-1yr
Size
30-70mm
Temperature
20〜26℃
Humidity
60〜80%
Diet
Tree sap, beetle jelly
Care Guide
Temperature
Maintain 20-26°C
Larval Care
Breeding Records & Localities
Captive record (♂)
86 mm
Wild record (♂)
87 mm
Record source: BE-KUWA 2025年度版（ディディエール 飼育86.0mm 佐々木大河 2023 / 野外87.0mm）
Notable localities
ベトナムラオス中国（雲南）
鹿の角状に湾曲した大顎を持つシカクワガタ。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
- WD
- Wild-caught
- WF1
- Offspring of a wild-caught female
- F1〜
- Captive generations (same locality)
- CBF1
- Cross-locality captive-bred (reset)
Sources: BE-KUWA 認定飼育レコード（むし社、2025年度版）
References & Sources
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.
Taxonomy & Authority
Accepted name: Rhaetulus didieri de Lisle, 1968
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listed
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.
Didier's Stag Beetle Listings
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