User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-21378804-20131003110715/@comment-4212769-20131003142914

I didn't say they think more in the Jungle than in the Volcano... :|

I said because Pink Rathian (in the Jungle) and Azure Rathalos (in the Volcano) are easier to be seen than their normal counterparts (Green in Jungle and Red in Volcano).

Also they can reproduce as they are such mutations like the black panther (AFAIK they can reproduce...).