''Losaria neptunus'', the yellow-bodied club-tail or yellow club-tail, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

butterfly Butterflies are insects in the macrolepidopteran clade Rhopalocera from the Order (biology), order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The ...

from the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Papilionidae Swallowtail butterflies are large, colorful butterflies in the family Papilionidae, and include over 550 species. Though the majority are tropical, members of the family inhabit every continent except Antarctica. The family includes the larges ...

that is found in

Sumatra Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...

, south

Burma Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John Wells explai ...

, north

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and eas ...

and the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

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
/ref> The larvae feed on ''

Thottea ''Thottea'' is a genus of flowering plants in the pipevine family, Aristolochiaceae. Accepted species ''Plants of the World Online'' currently includes: # '' Thottea abrahamii'' Dan, P.J.Mathew, Unnithan & Pushp. # '' Thottea adichilthottiana' ...

'' and ''

Aristolochia ''Aristolochia'' () is a large plant genus with over 500 species that is the type genus of the family Aristolochiaceae. Its members are commonly known as birthwort, pipevine or Dutchman's pipe and are widespread and occur in the most diverse clima ...

'' 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)

References

Butterflies described in 1840 Losaria Butterflies of Borneo {{Papilionidae-stub