Gender locked race?

[redcurrant18]

Wracking my head trying to figure out how on earth they could possibly justify having no male Viera being visible. I doubt a single forest fire would be enough to kill them off, regardless of whether or not it was caused by Garleans. They couldn't be killed by Black Rose either, since if that were the case it would not only kill them but the entire female Viera village and the Nu Mou as well. I feel that in addition to them being playable, they will probably be present in the forest as potential enemies to fight or wandering npcs in far reaches of the zone. Also, what would their interactions with the Nu Mou be like? Would they help the warrior of light in taking them and their primal down since they are a threat to the forest?