User blog comment:Kogath/Monster Hunter: World Discussion/@comment-6050823-20180605052242/@comment-5020152-20180605193505

@MHAdvent, Nuke2099, FlashyHunter

It's highly likely that, while it's a fact that Nergigante eats elder dragons, such a lifestyle probably comes with enormous risks. The only confirmed piece of evidence we have about Nergigante's predator status is that it wins turf wars with other elders. However, in a real-life setting, attacking other animals with a very similar place on the food web as yourself would be incredibly risky. Simply because of the sheer power that other elders possess, Nergigante would undoubtedly fail more often than not - most predators on Earth today have a low success rate - and would likely obtain injuries. (Which, come to think of it, is probably why it evolved such a high regeneration rate in the first place.) I'd say it's not farfetched to believe that many Nergigantes die in their attempts to keep themselves fed, whether because of starvation or from battles with its prey.

Come to think of it, what do baby Nergigantes eat? Are they given parental care until they're old enough to tackle their own elder dragons? Or do they grow up on their own, working their way up the food chain as they get older?