Didn't want to go too much into genetics and the whole landscapes because I don't know enough about all the games and the ins and outs of their lore aside from their land of origin Cathar in Heaven's Peak/Heaven's Mount. Also again, as I said, I am not an expert in science, nature and genetics.
And the genetics would have to be much more variable than humans. As well as upbringing and nutrition for them to live a lot or exactly like humans and still be and look so different from each other.
And I'd suspect some hybridisation with humans could be possible, even if unlikely, given some more human looking wyverians with plantigrade legs, four toes and shorter ears (Gen 4 mostly comes to mind)
And it is said for the giant wyverians, nothing canon has been said other than "although rare, some individuals are several times larger than humans". As I said, I went for canon only and didn't delve into headcanons and possibilities.
So, i might get in a lil trouble for it, but i took some illustrations from the complete works of monster hunter world to create a reference sheet for wyvernians.
figured i’d share it for those that wanna create their own wyvernians.
since i’m not profiting, i figure it’s okay.
i did notice something odd that i don’t know if it’s design fail or just a variation among the race, but the larger more human-like wyvernians have four toes, the small squishy squat ones have three toes. their foot wear also seems to vary quite a bit. Though it seems just as common for them to just opt to… not… wear shoes. at all. particularly among those that doesn’t really go out much like the ecologist and third fleet captain.