The blue vanga (Cyanolanius madagascarinus) is a bird species in the family Vangidae. It is in the monotypic genus Cyanolanius. It is found in Comoros, Madagascar, and Mayotte, where its natural habitats are subtropical or tropical dry forests and subtropical or tropical moist lowland forests. A taxon found on the Comoros Islands, the Comoro blue vanga is considered by most authorities to be a subspecies of the blue vanga (C. m. comorensis), though it has occasionally been considered a separate species, Cyanolanius comorensis.