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Dorcus titanus
A large flat stag beetle from Sumatra with flattened body and large mandibles. A popular exotic stag beetle rivaling the Japanese Dorcus hopei in popularity. Some individuals exceed 100mm in size, creating an overwhelming presence.
The Sumatran giant flat stag beetle (a population of Dorcus titanus) occurs on Sumatra and is a staple, highly popular exotic stag beetle. It is marked by a flat, heavy body and powerful mandibles, with large specimens sometimes exceeding 100 mm for striking presence. Care is 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 can grow large. With an aggressive temperament and a strong pinch, careful handling is advised for this popular species.
Source: Wikipedia (CC BY-SA 4.0)
Origin
Sumatra
Lifespan
Adult 1-2 years
Size
30-110mm
Temperature
20〜27℃
Humidity
60〜80%
Tree sap, beetle jelly
Maintain 20-27°C
Captive record (♂)
110.3 mm
Wild record (♂)
102.5 mm
Record source: BE-KUWA 2025年度版(ヒラタ・スマトラ 飼育110.3mm 佐藤礼頼 2025 / 野外102.5mm)
Notable localities
スマトラオオヒラタ。太く大型化する人気亜種。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 titanus (Boisduval, 1835)
Synonyms: Dorcus titanus, Lucanus titanus Boisduval, 1835
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
Raise in fermented mat or fungal bottle
Lays in soft logs or mat
Handle carefully as mandibles are extremely powerful
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Sumatran Giant Stag Beetle is 20〜27℃. Recommended humidity is 60〜80%. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Sumatran Giant Stag Beetle is Adult 1-2 years. With proper care and nutrition, they can live a long and healthy life.
Sumatran Giant Stag Beetle typically reaches 30-110mm as an adult. Size may vary depending on care conditions and individual genetics.
Sumatran Giant Stag Beetle feeds on: Tree sap, beetle jelly. Aim for a balanced diet with appropriate feeding frequency.
The price of Sumatran Giant 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