Die Rietduiker (Phalacrocorax africanus) is ‘n endemiese voël wat in Suid-Afrika, Zimbabwe en noord Botswana voorkom. Die voël is 50 – 56 cm groot en weeg 450 – 650 g met ‘n vlerkspan van 80 – 90 sentimeter. Hulle broei koloniaal in bome, bosse, riete, op kranse of op die grond van eilande. In Engels staan die voël bekend as Reed cormorant.
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.
This is a small cormorant at 50–55 cm length and an 85 cm wingspan. It is mainly black, glossed green, in the breeding season. The wing coverts are silvery. It has a longish tail, a short head crest and a red or yellow face patch. The bill is yellow.
Sexes are similar, but non-breeding adults and juveniles are browner, with a white belly. Some southern races retain the crest all year round.
The reed cormorant can dive to considerable depths, but usually feeds in shallow water. It frequently brings prey to the surface. It takes a wide variety of fish. It prefers small slow-moving fish, and those with long and tapering shapes, such as mormyrids, catfishes, and cichlids. It will less frequently eat soles (which can be important in its diet locally), frogs, aquatic invertebrates, and small birds.