Crocodiles were introduced to Lake Chala in the 1930's. According to legend they were brought in by E.S. Grogan, a British explorer who became famous for walking from Cape Town to Cairo in 1898. The terrain is totally unsuitable for crocodiles to breed, there being no beaches or sandy areas to make their nests. In the early 1990s fishermen were angered that their nets were continually being destroyed, and therefore began a program to eradicate them. There are no longer any crocodiles left in Lake Chala and the lake is safe for swimming; however as everywhere in Africa it pays to be careful