A small, plump reddish brown finch with a black head and thick silvery-blue bill. Immatures are plain sandy brown with slightly darker wings. Often seen in flocks, usually in grassy areas, including lawns, but also marshes and rice paddies; prefers wetter areas than Scaly-breasted Munia. Gives soft pipping and clinking notes; song includes quiet slurred whistles and bill clicks. Native to southeastern Asia, but introduced to numerous areas including the Hawaiian Islands, Japan, Ecuador, and Jamaica.