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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)
The Sumatran Giant Stag Beetle lives Adult 1-2 years.
The Sumatran Giant Stag Beetle grows to 30-110mm.
The ideal temperature for the Sumatran Giant Stag Beetle is 20〜27℃.
Origin
Sumatra
Lifespan
Adult 1-2 years
Size
30-110mm
Captive record (♂)
110.3 mm
Wild record (♂)
102.5 mm
Record source: BE-KUWA 2025 Edition (Flat-horned Sumatra captive 110.3 mm Reitai Sato 2025 / wild 102.5 mm)
Notable localities
Sumatra large flat stag beetle. A popular subspecies that grows thick and large. Captive records are updated annually in the BE-KUWA (Mushi-sha) contest. Individual value varies significantly by locality, generation (CBF/WF/WD), and size.
Generation codes
Sources: BE-KUWA Certified Breeding Records (Mushi-sha, FY2025 edition, JA)
Edited & verified by: BreederDirect 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: When importing live specimens of Scarabaeoidea (including rhinoceros beetles, stag beetles, flower beetles, etc.), a species identification certificate issued by the exporting country government agency or equivalent must be attached in accordance with the Invasive Species Act (import ports are limited to Narita, Chubu, Kansai, Fukuoka, and Kagoshima airports). This species itself is not a designated invasive species, and import is possible upon submission of the certificate.
Sources: Ministry of the Environment, Invasive Species Act: "Guidance for Those Importing Live Insects in Scarabaeoidea" / CITES Appendix (checklist.cites.org)
Regulations may change. Always verify the latest information with the relevant authorities.
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Temperature
20〜27℃
Humidity
60〜80%
Tree sap, beetle jelly
Set up a small to medium case with egg-laying logs and fermented substrate. Feed adults beetle jelly; adults live about 1-2 years.
Maintain 20-27°C. Avoid extreme heat and mist the substrate so it does not dry out.
Raise in fermented mat or fungal bottle
Lays in soft logs or mat
It is aggressive with a powerful grip, so keep singly rather than together. Do not leave a pair unattended during pairing.
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℃. 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 bloodline, size, captive-bred generation, and sex. Check our market price page for the latest pricing information.
Last updated: August 31, 2026