Chalcosoma atlas, commonly known as the Atlas beetle, is a large species of beetle native to Southeast Asia, particularly in forests. Males are notable for their impressive horns used in combat for mates. They exhibit a shiny, metallic exoskeleton and play a role in decomposing wood, contributing to forest ecosystems.

Chalcosoma atlas, commonly known as the Atlas beetle, is native to Southeast Asia. Its geographical distribution includes countries such as Indonesia, Malaysia, Thailand, and the Philippines. The species is typically found in tropical regions within these countries.

The Atlas beetle inhabits tropical rainforests, where it thrives in warm and humid conditions. The typical climate of these regions features high temperatures and significant rainfall throughout the year, providing a moist environment that supports lush vegetation.

Chalcosoma atlas primarily occupies the forest floor and lower canopy levels. It is often found in decaying wood and leaf litter where it can feed on decomposing organic matter. The species plays a role in the ecosystem as a decomposer, contributing to nutrient cycling within its habitat. Larvae develop in rotting wood, while adults are sometimes attracted to tree sap or fruit.