User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-2248808-20110826032448/@comment-1011548-20110828212118

'And there are very few animals that would extinct their own race are there?' Loads. Humans kill each other, obviously, but chimps chase down, murder and then eat their own kind, ants make war on others of the same species and practise slavery, male lions commit infanticide just to try and score, dolphins are right horrible things... I could go on. And it's never specifically stated Rathian Sub is just an older Rathian - in fact, I'd say it couldn't be, the changes are too drastic. It seems to me to be a branched-off Subspecies, that for some mystifying reason hasn't either gone extinct or outcompeted normal Rathian into extinction.