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 PhilippinesLosaria at Funet
The wingspan is . 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.ButterflyCorner.net
The larvae feed on Thottea and Aristolochia species.
Subspecies L. n. manasukkiti (Cotton, Racheli and Sukhumalind, 2005) - Ranong and southernmost Myanmar L. n. neptunus (Guérin-Méneville, 1840) - West Malaysia, southernmost Thailand L. n. creber (van Eecke, 1914) - Simeulue L. n. fehri (Honrath, 1892) - Nias L. n. lepida (Hanafusa, 1994) - Tanahmasa Island in the Batu Islands L. n. eminens (Hanafusa, 1990) - Sipora L. n. siborangitana (Tsukada and Nishiyama, 1980) - Northern Sumatra L. n. padanganus (Rothschild, 1908) - Western Sumatra L. n. doris (Rothschild, 1908) - Borneo L. n. dacasini (Schröder, 1976) - Palawan L. n. matbai (Schröder & Treadaway, 1990) - Tawi-Tawi
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