User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5581583-20120418022704/@comment-1758220-20120418025553

Keep in mind that Area 8 is actually a Rathian nest. You can find her eggs and such there, and that's where they spawn/go to rest. Thus, it is likely that the Great Jaggi remains are the result of a Rathian either feeding her young or feeding herself.

Qurupeco is almost exclusively a fish eater, and uses the mimicry to distract or scare away attackers with a more powerful monster. Qurupeco itelf isn't safe either, if you notice, it keeps a wide distance from the large monster, and if it does manage to hit it, it will be targeted and attacked.