The dusky munia (Lonchura fuscans) is a species of estrildid finch which is endemic to Borneo. It is also commonly referred to as the as the Dusky mannikin and the Bornean munia. It is in the family of perching birds (Passeriformes) and is in the genus Lonchura. It is a monotypic species, and there are no subspecies in the genus.