User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-5460283-20121201174351/@comment-5460283-20121203143826

@ a wikia contibutor

The other powerful monsters on the volcano driving furogi to extinction is different from a super powered rathian driving the other relatives in its ecological family to extinction ( I still say super ian is mimic).

1) The large predators will not attack a furogi pack unlesss 1.threatening teritory 2. too close to young 3. or desperate for food.

2) In "real life" predators don't attack for the fun of it because they would risk injury even from a furogi (if it cuts the other predator and spits poison into the cut it will get infected).

3) The larger predators probably wouldn't need to eat for days or weeks after having a good meal.

4) And mimic ian could drive other ians to extinction other than teritorial confrontation... 1.killing young 2. over hunting normal ian's normal food 3.mimic ian could also attack rathalos and its variants.

5) Just because they travel to areas away from the nest doesn't mean their solitary most of the year because they probably raise their young like birds where the male or female goes out and hunts this would ensure better survival chances for their young and species

6) mostly we see rathian in D.island/F.forest in MHTri which i beleive are geographically close and it traveling to S.plains could just mean that it couldn't find any food in F.forest because rathian in S.plains are more uncommon.