Rathalos and Rathian are flagship flying wyverns from Capcom's Monster Hunter series, first appearing in the original Monster Hunter in 2004. Rathalos, the male, is known for fire breath and aerial attacks, while Rathian, the female, fights more on the ground with a poisonous tail. Their roars are part of the series' monster vocalisations, signalling aggression when they spot a hunter. Clips of the roars spread through gaming videos, edits and soundboards, where fans reuse them for any large predator or dragon-like creature.