About Chalcosoma atlas (Linnaeus, 1758)
Chalcosoma atlas, commonly called the Atlas beetle, is notable for its large size, similar to other beetles in the genus Chalcosoma. Like most species in the Scarabaeidae family, male Atlas beetles are larger than females. Males reach a length of roughly 60 to 120 millimetres (2.4 to 4.7 inches), while females grow to about 25 to 60 millimetres (0.98 to 2.36 inches). Males have specialized horns on their head and thorax, which they use to fight one another to win mating access to females. The Atlas beetle can be distinguished from other Chalcosoma species, such as C. caucasus, by the broader end of its cephalic (head) horn. Chalcosoma atlas is distributed across Southeast Asia.
