The Common Mormon is widely distributed across Asia. It is a jet black butterfly with row of white spots along the middle part of hindwing. 90–100 mm.
It is a dark-coloured swallow-tailed butterfly. The upper forewing has a series of white spots decreasing in size towards the apex. The upper hindwing has a complete discal band of elongated white spots. It may or may not have marginal red crescents. The males are generally smaller in size than the females but not always.