This list pulled information for all of Tanzania, so it isn't specific to Dar.
The Red-footed Booby, Sula sula, is a large seabird of the gannet family, Sulidae. They are powerful and agile fliers, but they are clumsy in takeoffs and landings.
The Cape Gannet (Morus capensis, originally Sula capensis) is a large seabird of the gannet family, Sulidae.
The Great Cormorant (Phalacrocorax carbo), known as the Great Black Cormorant across the Northern Hemisphere, the Black Cormorant in Australia and the Black Shag further south in New Zealand, is a widespread member of the cormorant family of seabirds. It breeds in much of the Old World and the Atlantic coast of North America.
The Great Frigatebird (Fregata minor) is a large dispersive seabird in the frigatebird family. Major nesting populations are found in the Pacific (including Galapagos Islands) and Indian Oceans, as well as a population in the South Atlantic.
The African Darter (Anhinga rufa ), sometimes called the Snakebird, is a water bird of tropical sub-Saharan Africa.
The Reed Cormorant (Microcarbo africanus), also known as the Long-tailed Cormorant, is a bird in the cormorant family Phalacrocoracidae. It breeds in much of Africa south of the Sahara, and Madagascar. It is resident but undertakes some seasonal movements.