Found throughout the highland forests of Sumatra (900-2500 meters), this small partridge’s bright red bill is unique in its range. Also note its reddish-brown chest, scaly black-and-white flank feathers, black-and-brown-striped back. Head pattern varies; can be predominantly black with white speckling or predominantly white with black crown and nape. Song is a rising series of whistles, some of which have a doubled quality: “wuew, wuwuew, wuew.” Like other Arborophila partridges, pairs often duet, with one bird giving the rising whistle song and another giving a series of lower “ooh” notes.