- Order: Saurischia
- Suborder: Wyvern Feet
- Superfamily: Pre-Winged Legs Wyvern
- Family: Narga
- Species: Nargacuga
Nargacuga is a swift Flying Wyvern known to the Guild for many years. It is known for its different appearance from most other Flying Wyverns though its closest relatives are the Green Nargacuga and Lucent Nargacuga. Two other close relatives of Nargacuga are Barioth and Sand Barioth.
Nargacuga is extremely adapted to life in heavily forested areas. Old World Nargacuga thrive in the Great Forest, Old Jungle, Jungle, Misty Peaks, Old Swamp, Swamp, Sanctuary and Jurassic Frontier. Their New World counterparts are seen inhabiting the Deserted Island and Flooded Forest.
The Nargacuga is an incredibly powerful and highly adapted monster. There is almost no doubt that Nargacuga is the top predator in its most famed environment the Great Forest and a dangerous force to be reckoned within its other environments like Swamps and Jungles because of its camouflage, coupled with its phenomenal speed. The only predators which would be any fight for the Nargacuga would be the Chameleos in Jungles and Swamps, Kushala Daora, Espinas, Rathian, Rathalos which is sometimes found in Swamps and the Great Forest and to a certain extent, Yian Garuga, which sometimes inhabits the Great Forest as well as the Jungle. In the Misty Peaks, Nargacuga does not have many opponents that would be a match for it, with the exceptions of Zinogre and Mizutsune. Although Duramboros would not need to challenge Nargacuga for food, it would still likely try to kill Nargacuga due to its aggressive personality.
The Nargacuga is well adapted to heavily forested areas. Nargacuga is covered in black scales and fur so they can camouflage with the shadows. The reason why they don't have a shell is because with their hairs, Nargacuga are a lot more agile and don't have to worry about being slowed down by their shell while chasing down prey. To help Nargacuga cut through branches and vines in its environment, it has evolved wing blades that are used as both tools and as weapons. One slash from these blades can easily kill medium size prey. Though it has wings, it prefers to glide rather than fly. The Nargacuga's main weapon is its tail. The tail is half of its length and strong enough to break the bone of large monsters. If that wasn't enough, its tail is covered in many fine spikes used to deliver fatal blows in one swing or even shot at enemies from a distance. When Nargacuga's eyes glow red, it is its blood vessels that give it this color, which is used as a kind of mimicry.
In the Mezeporta district, there are reports of another species of Nargacuga. These Nargacuga have poisonous spikes on their tail and a very different enraged state. This state is neon in color with blue eyes, leaving behind an illusion or afterimage with each movement they take. Much like White Gale Nargacuga, this Nargacuga can produce cutting winds to attack foes.
Nargacuga is highly aggressive and bloodthirsty, they attack without reason as they enjoy fighting, and it will achieve whatever ends to get its prey. With hunters it tends to be more aggressive than with its prey.