User blog comment:Kogath/Monster Hunter 4 Ultimate for the Nintendo 3DS/@comment-8874090-20150818154032/@comment-25119729-20150818201639

Or it is simply the fact that the only thing why Remobra are now snakewyverns is the presence of other snake like monsters, the Najaralas. I don't know if they can be found around Jumbo, but if not, it would make sense to still refer to remobras as flying wyverns despite their snake heads.