Rathalos and Rathian are long-running flagship monsters from Capcom's Monster Hunter series, first introduced in the original game in 2004. Rathalos, the red male wyvern, and Rathian, the green female, are often paired as mates and appear together across many entries in the series. Their roars have become instantly recognisable to players, signalling a powerful flying wyvern hunt. Short clips of their calls circulate widely online in gameplay videos, memes and edits, where the distant version is favoured for its sense of scale and approaching threat.