User blog comment:Kogath/Monster Hunter: World Discussion/@comment-4370375-20171004163938/@comment-26034899-20171005001904

I had a feeling that Tobi-Kadachi would be a Fanged Wyvern, seeing how it has mammalian traits such as its gait, the amount of legs it has, and the fur lining its body, and Legiana being a Flying Wyvern makes sense, since it fits the general description for standard wyverns, extra pair of wings aside. As for Paolumu, I was honestly expecting it to be a Fanged Wyvern (it's very mammalian in terms of design, but it also has scales, so the chances of it being a Fanged Beast were pretty slim to begin with), but its classification as a Flying Wyvern isn't too out of the ordinary, seeing how mammalian Nargacuga and Barioth are, as Chimera-gui pointed out, and the series has had more bizarre choices for monster classification in the past (ex. listing Pokaradon as a Leviathan, a class consisting of serpentine and fish-like monsters, despite it being a mammal).