User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-2049092-20120215124604/@comment-4555457-20120216224701

their fighting style doesn't define their wyvern class, its based on its common traits - the bird wyverns of Tri and Portable 3rd are based on real life Raptors, early relatives of birds - this is why they're bird wyverns, much like the drome monsters from earlier games, brute wyverns are large and in charge, and also love to charge