Cometaster  Cometaster is a monotypic moth genus of the family Erebidae erected by George Hampson in 1913. Its only species, Cometaster pyrula, the faint owl moth or ying-yang moth, was first described by Carl Heinrich Hopffer in 1857. It is found in Eastern and Southern Africa, mainly in Botswana, the Democratic Republic of the Congo, Malawi, Mozambique, South Africa, Zambia and Zimbabwe. In October 2004, as part of a biological control project, larvae of this moth from South Africa were released in Queensland, Australia, in order to keep under control the type of acacia "Acacia nilotica" subsp. "indica", a major invasive species in the Mitchell Grass Downs.