
Source: Wikimedia Commons
Dynastes grantii
A white rhinoceros beetle from North America. Larger than Tityus with beautiful white body color.
Dynastes granti, the western Hercules beetle or Grant's rhinoceros beetle, is the largest beetle native to North America, distributed across the high-altitude conifer forests (1,500–2,500 m) of Arizona, New Mexico, and Utah in the southwestern United States. Body coloration is pale gray to white with black markings—among the most elegant of any rhinoceros beetle—and the color shifts with changes in humidity. Males are larger than the closely related D. tityus, reaching 40–80 mm in total length with the characteristic Dynastes paired horns. Standard beetle husbandry equipment is suitable: a medium to large enclosure with fermented substrate at 22–26°C. Females lay eggs in fermented substrate; larvae develop over approximately 1–2 years. Adults eat beetle jelly or banana and live 3–8 months. The combination of striking white coloration, impressive size, and status as a distinctive North American native makes D. granti one of the most desirable exotic rhinoceros beetles in the hobby.
Origin
southwestern United States, including Arizona, New Mexico, and Utah
Lifespan
Adult 3-8 months
Size
40-80mm
Temperature
20〜28℃
Humidity
60〜80%
Insect jelly
Captive record (♂)
89.1 mm
Record source: BE-KUWA 2025年度版(グラントシロ 飼育89.1mm 田野倉浩明 2009、全長=角込み)
Notable localities
北米産のシロカブト。乾燥すると白く明色化する。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: Dynastes grantii Horn, 1870
Synonyms: Dynastes tityus granti Horn, 1868
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
22-26°C is optimal
Standard beetle keeping setup is fine
Lays in substrate. Larval period 10-14 months
Body color changes with humidity, interesting trait
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Grant's Rhinoceros Beetle is 20〜28℃. Recommended humidity is 60〜80%. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Grant's Rhinoceros Beetle is Adult 3-8 months. With proper care and nutrition, they can live a long and healthy life.
Grant's Rhinoceros Beetle typically reaches 40-80mm as an adult. Size may vary depending on care conditions and individual genetics.
Grant's Rhinoceros Beetle feeds on: Insect jelly. Aim for a balanced diet with appropriate feeding frequency.
The price of Grant's Rhinoceros Beetle varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026