The butterfly belongs to the genus Losaria, or the clubtails, as they are commonly known.

[1] The butterfly is endemic and restricted to the Andaman Islands in the Bay of Bengal.

[2] Male differs from Losaria coon as follows:[3] Ground-colour a rich velvety-black, much darker than in doubledayi; on the fore wing the pale streaks extend only into the apex of the cell.

On the hind wing the medial white markings are much shorter, the spots at base of interspaces 4 and 5 and generally the spot in interspace 7 absent; the subterminal and terminal vermilion spots are much larger, and the tail is vermilion on its apical spatulate portion.

Female closely resembles the male, fore wing broader, red markings on hind wing more crimson than vermilion-red, often dull and irrorated slightly with black scales; medial white markings more extensive, the white mark in interspace 1 extends well below vein 1.It has been described as not rare but much work needs to be done to clarify its exact status and distribution.