This list pulled information for all of Tanzania, so it isn't specific to Dar.
Elattoneura glauca is a species of damselfly in the family Protoneuridae. It is found in Angola, Botswana, the Democratic Republic of the Congo, Equatorial Guinea, Ethiopia, Kenya, Malawi, Mozambique, Namibia, Somalia, South Africa, Tanzania, Uganda, Zambia, Zimbabwe, possibly Burkina Faso, and possibly Burundi. Its natural habitats are subtropical or tropical moist lowland ...more ↓
The Violet Dropwing, Trithemis annulata, is a species of dragonfly in family Libellulidae.