Loud but sluggish and difficult-to-see canopy inhabitant of highland forests in peninsular Malaysia and Sumatra. Note the leaf-green body, brightly colored face, and heavy black bill. More often heard than seen; listen for its long, unending series of hollow-sounding notes. Like many other barbets, it can be difficult to locate when singing, but can sometimes be seen at fruiting trees. Formerly regarded as the same species as Taiwan, Indochinese, and Chinese Barbets.