Up towards the snowline of the greatest mountain range on Earth, the Himalayan range that divides the Indomalayan from the Palaearctic realm, there is very little to support life. Yet even these bleak regions have a number of highly adapted animals.
The hanuhan is a dinosaur that has evolved to live in these harsh conditions. Its adaptations are similar to those of the balaclav thescelosaur of North America: deep layers of fat for insulation, and strong claws and beak for scraping the sparse plant and fungus material (mosses, lichens and other alpine plants) from the rocks crannies. Unlike the balaclav, though, it has evolved from the successful hypsilophodonts of the Cretaceous period. As such, it has probably come into the Indomalayan ecozone across the vast Himalayan mountains from the Palaearctic ecozone, rather than having been brought up from Gondwana in the south on the drifting Indian Subcontinent. It is a very nimble animal, sure-footed on crags and confident on the narrowest of ledges. The brain has developed well to control balance and muscular coordination. It could be that the hanuhan evolved from partly tree-living hypsilophodonts from the north before developing adaptations suitable for its mountaineering lifestyle.