Hippos and crocs annually vie for the dubious distinction of being the animal responsible for the largest number of deaths in Africa (the mosquito aside). The bottom line is that both are very dangerous, and are plentiful in the rivers and wetlands of the Zambezi Region. In particular, hippos wander freely through many camps at night. Though herbivores, they can be particularly aggressive both in the water and on land when they come out to graze, usually at night. If you happen to encounter one, make sure you are not between them and water. Males on average weigh in at 1.5 tonnes, though they can reach speeds of almost 30kph, so don’t try to outrun one. Nile crocodiles, on the other hand, are carnivores and see humans as legitimate food. Remain vigilant when walking along riverbanks, giving areas of long grass a wide berth.