Entirely dark brown munia; widespread across Borneo’s lowlands and lower-elevation foothills. Frequently encountered in grassland, scrubby or weedy forest edge, and agricultural areas, particularly rice fields. Adult has a bright silver-gray bill and is darkest on the face and throat. Juvenile paler and more mottled, with a dark bill. Often calls while in flight; gives a tittering “chir-r-r-rip!”, as well as high, plaintive peeps and quiet “pip”s and “tsip”s.