User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-217.129.17.186-20121204200248/@comment-1758220-20121204221217

I wonder if it's worth considering that perhaps if it IS a mimic, its disguise is used to not deter enemies, but LURE unsuspecting prey. It's not illogical to assume that Rathians in the desert are often preyed upon by powerful monsters such as Odeibatorasu or Kushala Daora. A monster as powerful as this wyvern could easily fight and in all likelihood kill and eat either of these monsters, and so, using the disguise of a Rathian, it waits until a large monster attempts to hunt it, at which point it can lash out with all its power, catching the predator off guard for an easy kill.