Atlas Beetle

Chalcosoma atlas

The atlas beetle (Chalcosoma atlas) is a large rhinoceros beetle from Southeast Asian forests. Males carry three prominent horns on the head and thorax and use them in contests over feeding and breeding sites, while females are hornless and more compact. The larvae are pale, heavy-bodied grubs that develop in decaying wood and rich organic matter, taking months to reach pupation.

In the beetle hobby, atlas beetles are kept for their size and dramatic male form rather than for handling. Larvae need deep fermented hardwood substrate or prepared flake soil, stable moisture, and enough space to build pupal cells without disturbance. Adults feed on beetle jelly or soft fruit, though fruit must be changed before it ferments or molds. Males may injure each other if housed together. Import rules, species identification, and captive-bred sourcing are important because many rhinoceros beetles are restricted across borders.