User blog comment:Kogath/Monster Hunter: World Discussion/@comment-31029678-20180105125227/@comment-31749298-20180105194907

Well people have complained/wondered about Zinogre being the only Fanged Wyvern for years. There's probably a good scientific reason in-canon for this as well. I could go into it but I'm half-afraid the mods will delete it like they did last time. :P