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Rainbow Stag Beetle (Color Morphs)
BeginnerPhalacrognathus muelleri var.
Color morphs of Rainbow Stag Beetle. Green, blue, red, purple, black — various color forms created through selective breeding. Extremely collectible.
Difficulty
Beginner
Temperature
20〜25℃
Lifespan
Adult 1-2 years / Larva 6-12 months
Size
25-65mm
Humidity
60〜80%
Diet
Jelly (adult) / Fungus bottle or fermented mat (larva)
About
The color morphs of the rainbow stag beetle refer to color variants of Phalacrognathus muelleri, native to Australia and New Guinea. The species naturally shows iridescent elytra varying among red, green, blue, and black, and selective breeding has produced lineages emphasizing particular hues such as green, blue, red, or purple, making them highly collectible. Care follows the base species, using a small to medium enclosure with fine fermented substrate. Adults are fed insect jelly, and oviposition occurs in the substrate. Relatively easy to keep, it is a popular stag beetle whose vivid colors can be enjoyed for a long time.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
northern Australia and New Guinea
Lifespan
Adult 1-2 years / Larva 6-12 months
Size
25-65mm
Temperature
20〜25℃
Humidity
60〜80%
Diet
Jelly (adult) / Fungus bottle or fermented mat (larva)
Care Guide
Color Selection
Fixing desired color requires multi-generational selection
Breeding Records & Localities
Notable localities
オーストラリア（クイーンズランド北部）ニューギニア
ニジイロクワガタ(Phalacrognathus muelleri)のカラーバリエーション。体色は個体・産地・累代で青/緑/赤系に変異。サイズ記録は基本種ページを参照。
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: Phalacrognathus muelleri var. (MacLeay, 1885)
Synonyms: Lamprima muelleri MacLeay, 1885, Phalacrognathus muelleri fuscomicans Kolbe, 1908, Phalacrognathus westwoodi Shipp, 1893
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.
Rainbow Stag Beetle (Color Morphs) Listings
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