Small, slim, long-tailed songbird of montane forests, usually vocal, active, and encountered in large flocks. Males have a bright orange belly, a comma-shaped slash on the wing, and a gray head and back. Females are similarly patterned, but have paler upperparts and white throat, with the male's orange replaced by yellow. Female resembles female Long-tailed Minivet, which has yellow forehead patch, lacking in Gray-chinned. Birds in Borneo, Sumatra, and the southern Malay Peninsula average darker-headed than populations elsewhere. Most calls are soft, high, and sibilant, given in flight.