Talk:Mamono/@comment-168.103.235.155-20141129071019/@comment-25035274-20141130223737

KC hasn't given concrete specifics about life-spans. The best you get is Kuruni's example from Druella's profile. Other than that, it's all theory.

My personal theory on the matter is that the most powerful mamono, i.e. the Demon Lord (who's a borderline god at this point), Dragon races, Kitsune races, Lilim, and probably pretty much all the Undead races (and probably a few other types besides, who've just slipped my mind at the moment) are immortal, while other, weaker races likely have progressively shorter life-spans until you hit the races that would likely have near-human lifespans, like the Goblins or Werewolves. I'd also expect that the birth-rates of each species varies depending on its expected life-span, with the longer-lived races breeding more infrequently than the shorter-lived races.

With that said, even for the short-lived races breeding is an infrequent thing according to KC, which we can assume is a result of their predatory nature. In the real world, predators tend to breed in smaller numbers than their prey, and we can likely infer that that's the reason why ALL mamono would breed more infrequently than humans.

Note that all of this, except KC's statements, is pure theory. Take it or leave it as you like.