The African Openbill (Afrikaans name Oopbekooievaar) is considered Near-threatened in Southern Africa.
It uses its strange bill to extract freshwater snails and Mussels, it occasionally feeds on frogs too. A pile of empty mussel shells on the bank is a sure sign that an Openbill has been there.
The upper mandible of the bill is designed to hold the prey under water while the lower bill is used to extract the flesh. We were so lucky to see one in the Kruger National Park