Suastus gremius, the Indian palm bob or palm bob, is a butterfly belonging to the family Hesperiidae. It is found in the Indomalayan realm. Wikipedia
Skippers are a family of the Lepidoptera named the Hesperiidae. Being diurnal, they are generally called butterflies. They were previously placed in a separate superfamily, Hesperioidea; however, the most recent taxonomy places the family in the superfamily Papilionoidea. Wikipedia
Life story of Palm Bob by Butterfly Cylce