Losaria neptunus

Losaria neptunus, the yellow-bodied club-tail or yellow club-tail, is a species of butterfly from the family Papilionidae that is found in Sumatra, south Burma, north Borneo and the Philippines

The wingspan is 100 - 120 mm. The wings are dark brown or black. The lower half of the abdomen is yellow. It has white markings on the forewings and a red patch on each hindwing.

The larvae feed on Thottea and Aristolochia species.

Subspecies

 * L. n. neptunus (southern Burma to Peninsular Malaya, Langkawi)
 * L. n. fehri (Honrath, 1892) (Nias)
 * L. n. sumatra Hagen (northern Sumatra)
 * L. n. padanganus Rothschild (western and southern Sumatra)
 * L. n. doris Rothschild (northern Borneo)
 * L. n. dacasini (Schröder, 1976) (Philippines: Palawan)
 * L. n. matbai Schröder & Treadaway, 1990 (Philippines: Tawitawi)