Simalia boeleni, commonly known as Boelen's python, is a non-venomous snake native to the highland forests of New Guinea. It exhibits striking iridescent black scales, changing colors in light. This elusive species is primarily arboreal, preying on birds and small mammals, and plays a key role in controlling prey populations.

Simalia boeleni, commonly known as Boelen's python, is native to the central highlands of New Guinea, which includes both Papua New Guinea and the Indonesian province of Papua. Its geographical distribution is restricted to these regions, where it inhabits montane areas.

Boelen's python is typically found in montane rainforests at elevations ranging from 1,200 to 2,500 meters (3,900 to 8,200 feet) above sea level. These areas are characterized by high humidity, frequent rainfall, and cooler temperatures relative to the lowland tropical regions. The dense forest canopy and undergrowth provide ample cover and hunting opportunities.

This species occupies a niche as a terrestrial and arboreal predator, feeding primarily on small mammals and birds. Its habitat preferences include areas with abundant vegetation for concealment and hunting. Boelen's python is adapted to the cooler, moist conditions of the montane forests, which influences its behavior and reproductive cycles.