Azuragrion nigridorsum, the black-tailed bluet or sailing bluet, is a species of damselfly in family Coenagrionidae. It is found in Angola, Botswana, Cameroon, Ethiopia, Kenya, Malawi, Mozambique, Namibia, Niger, South Africa, Sudan, Tanzania, Uganda, Zambia, and Zimbabwe. Its natural habitats are subtropical or tropical moist lowland forests, dry savanna, moist savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, subtropical or trop