This is a mottled emigrant butterfly (Catopsilia pyranthe) belonging to the family Pieridae, a common species of butterfly found in Southeast Asia, South Asia, and parts of Australia.
I noticed the butterfly at rest on the bougainvillea plant in my yard. That afternoon the weather was scorching with strong winds; even a butterfly was reluctant to fly. Embracing the leaves was preferable to fighting the wind current and the heat.
This is another entry I submitted for the daily #monomad challenge.
These photos are my own, taken with POCO X3 NFC smartphone + external macro lens.