The Kongamato, “overwhelmer of boats”, is a river-shutter of Kasempa District in northern Zambia. It is known from Kaonde folklore, and the Jiundu Swamp is one of its favorite haunts. The fact that the Jiundu has historically been a haven for thieves, murderers, and assorted lowlifes is probably relevant.
A kongamato is a kind of bird, or rather a lizard with the membranous wings of a bat. It has a wingspan of 4 to 7 feet across and lacks feathers, its body covered in skin. It is mostly red in color. The beak is armed with sharp teeth. Claims that the kongamato is a surviving pterosaur are best forgotten.
Kongamatos live downstream of river fords. There they cause the river to stop flowing and the water level to rise, overwhelming and tipping over canoes. Sometimes a canoe will slow down and come to a dead stop despite the paddler’s best efforts; this is because a kongamato has seized the boat from underneath the water.
Few people see a kongamato and live, and the kongamato itself is invulnerable and immortal, eating any projectile thrown at it and leaving no physical trace of itself behind. When it kills people it devours only the two little fingers, the two little toes, the earlobes, and the nostrils. That said, four deaths attributed to the kongamato in 1911 did not record any such mutilation; more likely, then, that a kongamato caused their deaths by the flooding of the Mutanda River near Lufumatunga.
To ward off kongamato attack, the charm known as muchi wa kongamato is used. This consists of mulendi tree root ground and mixed with water. The resulting paste is placed in a bark cup. When crossing a dangerous ford, the mixture is sprinkled onto the water using a bundle of mulendi bark strips. This wards off the kongamato and its floods.
References
Melland, F. H. (1923) In Witch-bound Africa. J. B. Lippincott Company, Philadelphia.