India and Sri Lanka past Bangladesh, Myanmar and finally to Thailand, is anybody's guess. But it
was already a resident species in Thailand by the early 80's.
Various lepidopterists in India are still debating on the actual scientific name of the Tawny
Coster, preferring the precedent name of Acraea terpsicore to the more recent name Acraea violae.
The jury is still out on the final name.

Tawny Coster
Order: Lepidoptera
Family: Nymphalidae
Subfamily: Heliconiinae
Tribe: Acraeini
Genus: Acraea
Species: Acraea violae (acraea terpsicore)