Yian Kut-Ku Topics:

Yian Kut-Ku is a Bird Wyvern introduced in Monster Hunter.

MH4-Yian Kut-Ku and Konchu Render 001


The Yian Kut-Ku is characterized by its large, fan-like ear frills that unfurl when excited and enlarged lower bill. They have a large, yellow beak with a pink stripe running central down the length of the upper beak. The lower jaw of its beak is significantly larger and bulkier than the top jaw. Yian Kut-Ku's body is covered in orange-pink plating and beige scales. Its wing membranes are deep blue and its eyes are bright yellow. These wyverns are small and relatively light, making them quick and agile. They have an extremely powerful sense of hearing, thanks to the large frills circling their ears.


The Yian Kut-Ku is capable of moving at high speeds thanks to its light weight and small stature. It is also able to produce flaming projectiles coming from its flame sac, which can be shot from the mouth at attackers. It can spew three flaming projectiles at hunters when enraged and move faster


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 squawking loudly. They are generally insectivores, preying on Konchu and other Neopterons as a main part of their diet.


Yian Kut-Ku inhabits many forested areas such as the Forest and Hills and Everwood.

Other Non-Subspecies Forms

Hard Core (HC) Yian Kut-Ku

FrontierGen-HC Yian Kut-Ku Render 001 (Edited)

Hardcore Yian Kut-Ku became available. This variant can perform a circular rampaging charge attack with extreme attack power, and has the ability to spew a Fire Ball that causes a wall of fire.

Game Appearances

Chronological Appearances
First US / EU Appearance: First JP Appearance: Latest Appearance:
Logo-MH1 (2004) Logo-MH1 (2004) Logo-MHXX (2017)

In-Game Description

Monster Hunter Freedom 2 / Monster Hunter Freedom Unite
MHFU-Yian Kut-Ku Icon A bird-like wyvern with a huge beak and large ears that splay open when it is angered. With its sensitive hearing it dislikes loud noises. It is smaller but faster than other wyverns.
Monster Hunter 4
MH4U-Yian Kut-Ku Icon 鳥型の飛竜。 りっぱな顎と、怒るとひらく大きな耳が特徴。 聴覚が優れる反面、大きな音にはめっぽう弱い。 飛竜の割に小柄で、逃げ足が速い。
Threat Level (危険度): ★★★
Monster Hunter 4 Ultimate
MH4U-Yian Kut-Ku Icon A bird wyvern with a huge beak and large ears that splay open when it is angered. Due to its sensitive hearing it dislikes loud noises. It is smaller but faster than other wyverns.
Threat Level (危険度): ★★★
Monster Hunter Generations
MH4U-Yian Kut-Ku Icon A bird wyvern with a huge beak and large ears that splay open when it is angered. Quick on its feet, and known to be territorial. It's known for its love of Konchu, and has been observed digging them up out of the ground to swallow them whole.
Threat Level (危険度): ★★★
Monster Hunter Stories
MHST-Yian Kut-Ku Icon Monsters boasting ample beaks and fan-like ears that splay open when angered. Konchu are a staple food.
Monster Hunter Frontier G
FrontierGen-Yian Kut-Ku Icon (?)
Monster Hunter Online
MHO-Yian Kut-Ku Icon 鸟脚亚目,走龙下目,蓝速龙科。行动迅速的小型食肉龙,集团行动的典范。身形不算特别强壮,却能依靠锐利的爪牙和出色的合作意识,狩猎比它庞大数倍的猎物。
Threat Level (危険度): !!

Analysis and Guides

For details on older games this monster has appeared in, see Yian Kut-Ku Guides.

Yian Kut-Ku Analysis for Monster Hunter 4
MH4-Yian Kut-Ku (Cutting Damage) MH4-Yian Kut-Ku (Impact Damage) MH4-Yian Kut-Ku (Shot Damage)
Cutting Damage
(Click Image to Zoom)
(Coming Soon)
Impact Damage
(Click Image to Zoom)
(Coming Soon)
Shot Damage
(Click Image to Zoom)
(Coming Soon)
Brighter Red means more damage, while Darker Red means lesser damage.
Credits for the Images used above goes to kei_9 (ケイ) of Pixiv

Raw Hitzone Damage Data
Hitzone Cutting Damage Impact Damage Shot Damage
Head 50 80 100
Neck 50 60 50
Back 40 50 40
Belly 80 70 80
Wings 75 70 70
Legs 25 30 30
Tail 50 60 30
Element Hitzone Damage Data
Hitzone Fire Fire Water Water Thunder Thunder Ice Ice Dragon Dragon
Head 10 30 30 40 0
Neck 10 80 50 50 20
Back 10 20 15 15 0
Belly 10 20 15 15 0
Wings 10 10 25 15 0
Legs 5 5 5 5 0
Tail 10 20 15 15 0
This Monster is weakest to: Status Effect-Waterblight MH4 Icon Water on Neck:
  • On Belly (Cutting Damage)
  • On Head (Impact and Shot Damage)

Status Effects Data
Poison Paralysis Sleep Stun Fatigue Blast Mount
Initial Tolerance N/A N/A
Max Tolerance N/A N/A
Tolerance Increase N/A N/A N/A N/A N/A N/A N/A
Duration N/A N/A N/A
Damage N/A N/A N/A N/A N/A N/A
Item Effectiveness Data
Item Name Able
Normal Enraged Fatigued
Pitfall Trap Yes N/A N/A (?)
Shock Trap Yes N/A N/A (?)
Flash Bomb Yes N/A N/A (?)
  • Flash Bombs will only work if Yian Kut-Ku is facing the Flash Bomb when it goes off.
Sonic Bomb Yes N/A N/A (?)
  • Sonic Bomb works only if Yian Kut-Ku is not enraged.
Meat No N/A

Analysis Data Source/s:

MH4U Breakable Parts

Head (x1)
MH4U-Yian Kut-Ku Head Break 001Indent08MH4U-Yian Kut-Ku Head Break 002


  • The name "Kut-Ku" may come from the word "cuckoo" for its bird-like characteristic and appearance.
  • The large frills or discs around its ears function similarly to the facial discs of owls, enhancing their hearing.

  • There is a quest called "At Birds Hill..." which requires players to fight an extremely small Yian Kut-Ku at the Forest and Hills zone, which is most-likely a young Yian Kut-Ku. It has a different voice due to its miniscule size, yet its fireball attack increases in power and explosion radius, this may be because it doesn't have very good control over its Flame Sac.
  • Yian Kut-Ku can be sometimes be seen drinking from the ponds in Areas 9 and 10 of the Forest and Hills.

  • The Yian Kut-Ku has 4 toes while in previous generations, it had 3 toes.
  • Yian Kut-Ku will prey on Konchu to regain stamina.
  • Yian Kut-Ku is now capable to release 2 fireballs instead of 1.
  • While low on stamina, Yian Kut-Ku won't be able to shoot fireballs, and its beak will get stuck in the ground when it performs its pecking attack.
  • In G-Rank, Yian Kut-Ku can dig up Konchu and throw them at the hunter.

  • Yian Kut-Ku can be a pet, its favorite foods are insects and worms.

  • This monster is unlocked at Level 10.
  • Yian Kut-Ku's ears can be broken twice.
  • Yian Kut-Ku's ears will fold back when affected by a Sonic Bomb and are not used as a weakness sign.

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