This is a medium sized migratory species which belong to the family of Nymphalidae. Note that it has a broad white median band, a red postal band and a red distal band ( not clearly visible in the underside.)
It feeds on a range of sources from flower nectar to mud sipping (which it is doing in the picture) as it has a good range of flight altitude. As well, note that it is sitting only on four legs, which is a key characteristic of the family of Nymphalidae.
The picture was clicked in a Kandyan home garden though this species is known to be found mainly in forest areas of the wet zone of the country.