Butterflies of the Indian subcontinent
Six-bar Swordtail
Graphium eurous  LEECH, 1893
subfamily - PAPILIONINAE
Tribe -
Graphium eurous male, Sikkim, India   Adrian Hoskins
The genus Graphium is widespread in the Old World, with 35 species in the Afrotropical region, 14 in the Oriental region, 6 in the Holarctic ( south & west China ) and 20 in the Australian region.
Many of the Oriental species have a pattern of translucent turquoise or yellowish 'windows' in their wings. Several however have a tiger pattern similar to that of the Danaine genera Parantica and Tirumala, and others such as aristeus, eurous and glycerion are white with black stripes and long tails.
Graphium eurous is found in northern India, Nepal, Bhutan, Thailand, Tibet, China and Taiwan.
This species occurs in forested habitats at altitudes between about 1000-2500m.
The larval foodplant is Machilus ( Lauraceae ).
Adult behaviour

As with other Graphium species, eurous males adopt the 'filter-feeding' technique - using their long proboscises to continually suck up water from which they extract sodium and other minerals. They constantly pump the water through their bodies, expelling the surplus from the anus, and using it to dissolve further minerals from the ground, which they re-imbibe.


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