The Black-and-white Mannikin or Black-and-white Munia Lonchura bicolor is a species of estrildid finch found in southern 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 known to feed on algae.