Espinas is a wyvern that is, for now, exclusive to Monster Hunter Frontier. Espinas is physically similar to a Rathian, but along side scales their bodies are covered in hot pink spikes and rough green armor plating.
They are an entirely passive wyvern when not enraged, not attacking hunters and relying on its thick, near impenetrable shell for protection. However, once enraged, a soft pink color passes through its body and it becomes very aggressive. This increase in aggression is balanced by a new weakness - when enraged, the Espinas is much more vulnerable to attacks. They can quickly spit purple globs of poison at a hunter, and charge similarly to a Basarios or Monoblos, ramming enemies with its horn.
There are two Espinas subspecies; the Orange Espinas, featured in Monster Hunter Frontier 2.5, and the White Espinas featured in Monster Hunter Frontier 5.5.
- It can shoot poisonous fireballs and most of its attacks can poison the player. One of its attacks is that it will raise his head and shoot 3 poisonous-paralyzing fireballs around him. Another of its attacks consists of shooting 2 fire balls, one to the left and one to the right, and one more, which is done flying backwards. It is also able to make a huge poisoned-fireball which leaves poison-effect and stamina loss.
- Inflicting the Sleep effect upon the Espinas will cause it to drop an item.