Order:Saurischia - Suborder:Bird Feet - Infraorder:Bird Wyvern - Superfamily:Eared Bird Wyvern - Family:Kut-ku. A member of the Bird Wyvern family, Yian Kut-Ku is easily one of the most recognizable of all bird wyverns due to its somewhat comical appearance. These Bird Wyverns have lightweight frames, hollow bones, and typically have large beaks. They are very fast on ground, and competent fliers in the air. Yian Kut-Ku closely resembles and shares its superfamily with its cousin, Yian Garuga. The Bird Wyvern is often described to run and peck like a chicken and look somewhat like a parrot.
The Yian Kut-Ku often nests in the Jungle, favoring its warm climate and abundance of food. The Yian Kut-Ku can also frequently be seen in the Forest & Hills, as well as the Swamps. This would further indicate that most Kut-Kus prefer warmer climates, where smaller prey, and water, can be frequently found. They also are rarely seen in the Volcano possibly to eat coal or other ingredients supply there flame sac with. The Yian Kut-Ku share a preference for many of the same nesting grounds that larger wyverns, such as the Rathalos and Rathian. This causes the small Bird Wyverns to be very cautious and skittish.
Yian Kut-Ku are omnivorous creatures that eat a wide variety of different things. Kut-Ku will eat lots of insects, nuts and honey. While they are fully capable of defending themselves against smaller predators such as Velocidrome and their packs Kut-Ku are often preyed upon by larger predators.
The Yian Kut-Ku are capable of flight, which is a major advantage when fleeing from large terrestrial predators. However they aren't as adept in the air when compared to other wyverns. Kut-Ku spend more on land. The Yian Kut-Ku can hurl large fireballs, and, although these are effective at killing weak prey and predators, they have little effect against larger and more powerful predators. Kut-Ku have very large and sturdy beaks used to crush hard-shelled prey and fruit, as well as aid them in shoveling up ground-dwelling insects and larvae. The most defining trait of Yian Kut-Ku are their specialized large ears. These ears are very sensitive to sound and sudden loud noises can disorient them leaving them vulnerable to attack,thus causing hunters to often use Sonic Bombs when hunting these creatures. Some rare individuals most likely elder Kut-ku are seen with larger ears, larger muscles, and a more developed flame sac able to make short lived walls of fire making this elder Kut-ku even stronger than a Yian Garuga.
During breeding season female Yian Kut-Ku grow feathers on their abdomen. These feathers are used to keep their eggs warm. These feathers can also be considered a remnant of their ancestors.
A somewhat temperamental, skittish, and inquisitive wyvern. Yian Kut-Ku have a tendency to want to appear bigger than they really are by spreading their wings, flaring out their ears, and shriek out a loud squawking roar. The Bird Wyverns hope that this show of bravado will discourage predators but if it fails Kut-Ku will immediately flee the area. Though some individuals are more powerful than they appear as they age. During the breeding season female Yian Kut-Ku grow feathers on their abdomen and use them to keep their nests of eggs warm. After the eggs hatch and Yian Kut-Ku chicks are born the mother watches over them and feeding them honey and insects till they reach a certain age.