The black-and-white mannikin or black-and-white munia (Lonchura bicolor) is a species of estrildid finch found in western and central Africa. It has an estimated global extent of occurrence of 4,200,000 km2. It is found in moist savanna and subtropical/tropical lowland moist forest habitat. The status of the species is evaluated as least concern. They are seedeaters, but are known to feed on algae.