Source: http://monsterhunter.wikia.com/wiki/Deviljho

Deviljho is a Brute_Wyvern introduced in Monster Hunter 3.

Deviljho is a very large, bipedal Brute Wyvern characterized by its uniform forest green coloration and muscular upper body. Its thick hide is littered with short, jagged spines that reach a maximum height along the back and tail. Deviljho has a narrow snout with a large lower jaw, covered in multiple rows of spines spreading outwards from the teeth. It has massive, powerful hind legs, but tiny, poorly developed forelegs that it rarely utilizes. When provoked, Deviljho's back and shoulder muscles swell considerably. During this period, areas of its skin will take on a bright red coloration.

Deviljho is armed with a powerful set of jaws that it can use to deliver bone-crunching bites to prey and foe alike. In addition, its powerful hind legs allow it to run at relatively high speed and leap considerable distances towards prey. When enraged, Deviljho is capable of producing a mysterious clouded emission which can be shot out of the mouth in a stream at prey. This substance contains the Dragon Element and can be very deadly to hunters as well as other monsters.

Deviljho is a nomadic monster, prone to wandering vast distances in search of prey. Its status as a super-predator allows it to overtake the territory of any monster that stands in its path. Because of the extreme amount of energy its body consumes, Deviljho is always in search of food sources. It is known to be cannibalistic, and is also prone to eating prey alive in order to waste as little time as possible in replenishing its energy.

Because of its nomadic nature, Deviljho is known to inhabit a wide variety of environments, such as Tundra, Deserted Island, and Volcano. Its presence is often disruptive to the natural ecosystem.