A stag beetle named for the hills of Assam
It was resting low against the surface in the monsoon forest of Medog, dark and compact, and it took me a moment to register what I was looking at: the heavy head and the curved mandibles gave it away. A stag beetle, sitting quietly as if it owned the place.
This is Cyclommatinus assamensis assamensis, a stag beetle of the family Lucanidae in the order Coleoptera. The species name assamensis means “from Assam,” the region of northeastern India just beyond the mountains where this beetle’s range extends, and the doubled name marks it as the nominate subspecies of its kind.
Stag beetles are the knights of the beetle world. The males of many species grow oversized mandibles that they use in wrestling matches over females, locking jaws and heaving like miniature bulls. For all their fearsome look, the jaws are usually more about pushing than piercing. Females of many species also carry respectable jaws, used mainly for digging into wood, though they never reach the males’ showy size. The larvae, meanwhile, spend years chewing through decaying wood, slowly converting dead timber back into forest soil.
Medog sits at the junction where the faunas of India and Southeast Asia meet the Himalaya, and finding an Assam-named stag beetle here felt like walking into the middle of a conversation between two worlds. It stayed put for a photograph, then ambled off into the leaf litter, unhurried as ever, the way only a creature with nothing to fear moves.
