Bombing Run
Using its light weight to its advantage, it will run forward while flailing its body and spitting fireballs to the side with each step. This rush will end with Yian Kut-ku tripping over itself. That trip is a good time to attack.
Pecking Combo
A combo that can be telegraphed when it raises its head high then proceeds to quickly peck down in the ground in front of it. Has a somewhat wide front area as it pecks from side to side and not the same spot. Can also use it continuously. So long as the Hunter is not in front, it can be avoided.
Fireball Spit
Another move that is telegraphed by the way it raises its head but instead of pecking down, it launches a fireball spit. An enraged version will have a little bit more delay but will have a bigger explosion when it lands. Usually aimed straight at a Hunter but is not a huge ball. So moving to any side can effectively dodge the ball form. However, the explosion can still hit unaware Hunters.
Fly & Strike
Beats its wings to take to the sky then flies to an enemy and strikes with their talons. The beat of the wings can cause minor wind pressure and leave a Hunter open for the talon strike. Not staying right under Yian Kut-ku will help avoid this problem.
Beak Rush
Positions the head low to rush past everything. Knocks people away if hit and effectively moves to a new position.
Retreat
A quick beat of their wings to retreat and create distance. The beat of wings can cause minor wind pressure. Not being close under Yian Kut-ku will avoid the wind pressure.
Fire Spit Combo
Spits out fireballs in a spread pattern in front. Yian Kut-ku will try to aim at Hunters. Because it is a long distance move, it can be evaded if seen.