Bird Wyverns

Canon info:https://monsterhunter.fandom.com/wiki/Bird_Wyvern

Bird Wyverns are a group of distantly related coelurosaurs(mostly maniraptorans), akin to the polyphyletic condylarths of the real world. They are usually small to medium sized animals that includes flying species with slender bodies that are bipedal and, in some cases, either have wings or lack wings.

There are two distinct types of Bird Wyverns: Flying Bird Wyverns and Theropod Bird Wyverns. Flying Bird Wyverns exhibit similar characteristics to modern birds and wyverns, with a bipedal stance along with developed and functional wings. Many of these possess a hard, sharp beak(similar to their bird relatives) which can be used to peck at attackers, and generally behave in a bird-like manner. Theropod Bird Wyverns are reminiscent of many non-avian dinosaurs: flightless, bipedal theropods with long tails and powerful legs. Unlike Brute Wyverns however, these monsters are generally quite small. Furthermore, Theropod Bird Wyverns almost always live under a social hierarchy, with young individuals, females and  beta  males led by a strong, dominant  alpha  male, which can command and control his subjects during combat.