Great Thunderbugs are also known to change into two different colors: blue and reddish-white. When in their normal and docile state, they are blue, but when attempting to attack, the blue hue becomes a fierce, glowing reddish-white; if they strike a hunter in this state they will cause notable damage. Eyewitness reports also claim that some Elder Dragons are hosts to them, providing a safe environment in which to mature. A famous example of this is the Yama Tsukami. However, the Great Thunderbugs released by Yama Tsukami are unique in that they can explode. In MHP3rd and MH3U, they are often found with Zinogre. However, these Thunderbugs appear to be smaller and don't explode.
Great Thunderbugs are naturally found in the Tower and Jungle.
Monster Hunter Freedom 2 / Monster Hunter Freedom Unite
An abnormally large Thunderbug raised inside the body of an elder dragon and known to inhabit the same areas as its former host, its electrical attack is deadly. This bug has various uses as material for crafting weapons and items.
Monster Hunter Frontier G
Monster Hunter Stories
Gigantic Thunderbugs that are raised in the bellies of Elder Dragons. Electrifyingly lethal.