Thai Cruiser feeding on poinsettia flowers

I came across these butterflies feeding on poinsettias in early November (2013) when I visited the headquarters of the Doi Suthep-Pui National Park, Chiang Mai, Thailand. The butterfly is the Common Cruiser (or Thai Cruiser) Vindula erota erota Fabricius, 1793 (female). This species, especially the female, exhibits seasonal variation, and this is the dry-season form,…