It is essentially the same creature, only possessing a different coloring and increased health. The grey appearance of their massive scales is due to lifelong exposure to the ashes from volcanic eruptions rather than the iron-like particles found near Pokke Village.
Ashen Lao-Shan Lung is extremely docile, only directly attacking creatures that disrupt its feeding. The creature often takes little notice of hunters, but will occasional tackle perches that hunters shoot at the creature from.
They typically migrate from volcanic areas in the time of season where the temperature becomes too hot to handle.