The Savage Deviljho is a variant, not a subspecies, of the Deviljho. It is only encountered in G-Rank quests in Monster Hunter 3 Ultimate. Like Deviljho, it can be encountered in any environment.
Their standard appearance and abilities are the same as that of a normal Deviljho in rage mode. When enraged, they have a dark red haze surrounding their faces, eyes turn into a blood red hue and skin changes to a light brownish color.
The dreaded, nomadic Deviljho have no specific territory of their own. Their muscles swell if provoked, revealing old wounds. Needing to feed constantly due to high body heat, they can hunt nearby animals to extinction.
It only appears during G-rank quests in Port Tanzia, and the chance of encountering one is very low.
Whilst its attacking patterns and behavior are largely similar to the ordinary Deviljho, Savage Deviljho is also able to connect a lunging bite to a burst of dragon breath.
Its dragon breath also has a longer range than the regular Deviljho's, but only in rage mode.
Savage Deviljho also has an exhausted state like other monsters. In this state Savage Deviljho appears the same as it does out of rage mode, only with acidic saliva leaking out of its mouth, which can cause the Defense Down status.
It is similar to the "Golden" Rajang of MHFU, in the sense both are variants of their regular species without being considered Subspecies ingame.
Ingame, the Savage Deviljho uses the same icon as the normal Deviljho, but a different icon was shown in a magazine scan that went unused:
This Icon is lately featured in Monster Hunter 4 as a target icon when hunting the Savage Deviljho
Interestingly, another icon is used in the game too:
Unlike normal Deviljho, it can use the dragon breath both in and out of rage mode.
It also has an additional material item not obtainable from the normal Deviljho, called Black Blood. This item can only be obtained in rewards and cannot be carved. It is required to create the waist of the Vangis X armor set, and upgrade Deviljho-based weapons to their max potential.