Source: Wikimedia Commons
Deyrolle's Stag Beetle
BeginnerHexarthrius deyrollei
The Indochinese subspecies of Parry's stag beetle from south-eastern Myanmar to northern Thailand. The boundary between the orange rear elytra and the black is sharp, and the forked mandibles and head knobs give it presence. Rarely traded, but as hardy to keep as the Malay-Sumatran form.
Difficulty
Beginner
Temperature
23〜25℃
Lifespan
Adults 6-8 months (general figure for Parry's stag)
Size
Males up to 86.5mm (wild max), female 44.5mm in a captive example
Humidity
60〜80%
Diet
Beetle jelly (adults); fermented substrate or kinshi bottles (larvae)
About
Deyrolle's stag beetle (Hexarthrius deyrollei) ranges from south-eastern Myanmar to northern Thailand and is now treated as the Indochinese subspecies of Parry's stag beetle, H. parryi deyrollei. Parry's stag is a large fork-horned species with the rear three-quarters of the elytra orange, divided into the nominate form (north-east India to Indochina), elongatus of Borneo, paradoxus of the Malay Peninsula and Sumatra, and this subspecies. Compared with the nominate form it has a sharper boundary between black shoulder and orange. The wild maximum is 86.5mm, and the BE-KUWA 2025 captive record is 87.0mm (2019). Japanese trade is dominated by paradoxus, and this subspecies is seldom offered. Husbandry follows Parry's stag: adults at 23-25C, laying in Quercus logs laid on the surface at 25-27C, larvae on fermented substrate or kinshi at 20-23C emerging in 8-12 months (males) or 6-10 months (females).
Source: Wikipedia (CC BY-SA 4.0)
Lifespan of the Deyrolle's Stag Beetle
The Deyrolle's Stag Beetle lives Adults 6-8 months (general figure for Parry's stag).
Size of the Deyrolle's Stag Beetle
The Deyrolle's Stag Beetle grows to Males up to 86.5mm (wild max), female 44.5mm in a captive example.
Temperature & humidity for the Deyrolle's Stag Beetle
The ideal temperature for the Deyrolle's Stag Beetle is 23〜25℃.
Basic Info
Origin
South-eastern Myanmar to northern Thailand (Omkoi etc.)
Care Specifications
AggressiveSolitaryBreeding: Moderate
Sources: Hakurai Rokkyakudo: rearing Hexarthrius parryi / Oshiromushi: H. parryi deyrollei WF2 rearing log / Mushinavi: Hexarthrius parryi / COLORS fork-horned stag beetle catalogue / Wikipedia (ja): Hexarthrius
Breeding Records & Localities
Captive record (♂)
87 mm
Record source: BE-KUWA 2025 edition (Parry's stag, deyrollei: captive 87.0mm, Daisuke Fujikawa, 2019; wild record 87.0mm)
Notable localities
Northern Thailand (Omkoi)South-eastern Myanmar
Regional subspecies
- Hexarthrius parryi parryi（nominate subspecies） — North-east India to Indochina
- Hexarthrius parryi deyrollei（this entry） — South-eastern Myanmar to northern Thailand
- Hexarthrius parryi elongatus — Borneo
- Hexarthrius parryi paradoxus — Malay Peninsula, Sumatra
BE-KUWA lists Parry's stag by subspecies: paradoxus 92.1mm (2017), elongatus 90.9mm (2025), deyrollei 87.0mm (2019); no entry for the nominate form. The female record for the species is 55.8mm (2011).
Generation codes
- WD
- Wild-caught
- WF1
- Offspring of a wild-caught female
- F1〜
- Captive generations (same locality)
- CBF1
References & Sources
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.
Primary sources
- Wikipedia
- Ministry of the Environment (Japan): Importing live Scarabaeoidea beetles
- CITES Appendices (species not listed)
- Hakurai Rokkyakudo: rearing Hexarthrius parryi
- Oshiromushi: H. parryi deyrollei WF2 rearing log
- Mushinavi: Hexarthrius parryi
- COLORS fork-horned stag beetle catalogue
- BE-KUWA certified breeding records (Mushi-sha, 2025 edition)
- GBIF
Taxonomy & Authority
Accepted name: Hexarthrius deyrollei Parry, 1864
Synonyms: Hexarthrius parryi deyrollei
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listed
Plant Protection Act: Live Scarabaeoidea beetles (rhinoceros, stag and flower beetles) may be imported into Japan only with a species-name certificate issued by the exporting government under the Invasive Alien Species Act, and only through Narita, Chubu, Kansai, Fukuoka or Kagoshima airports. This species is not a designated invasive alien species and can be imported with the certificate.
Sources: Ministry of the Environment (Japan): Importing live Scarabaeoidea beetles / CITES Appendices (species not listed)
Regulations may change. Always verify the latest information with the relevant authorities.
Deyrolle's Stag Beetle Listings
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