Junonia atlites, sometimes also called the Grey Pansy, is a butterfly species found in South Asia.
The Grey Pansy has quite distinct wet- and dry-season forms where the underside markings are darker and more pronounced in appearance in the wet-season form.
The Grey Pansy is usually alert and skittish, and adopts a flap-and-glide flight pattern. 
It has a habit of returning repeatedly to a few favourite perches when it patrols its territory, and then open its wings flat to sunbathe.

1st, 2nd & 3rd photo: Chiang Mai area, Thailand, 24 & 25 December 2009
4th photo: Khao Yai National Park, Thailand, 31 December 2009
5th photo: Koh Chang, Thailand, 5 January 2010