
Plain Tiger (presumed), Sri Lanka
I'm not 100% confident of the species. It's hard to identify from the bottom. I've searched almost all Sri Lankan species of butterfly but could not find anything closer than the Plain Tiger. Feel free to challenge the identification.

"Danaus chrysippus", also known as the plain tiger, African queen, or African monarch, is a medium-sized butterfly widespread in Asia, Australia and Africa. It belongs to the Danainae subfamily of the brush-footed butterfly family Nymphalidae.
Similar species: Moths And Butterflies
By Ferdy Christant
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Uploaded Jan 10, 2015. Captured Nov 8, 2014 15:41.