And other large animals that we observed was the hippopotamus. It is the third largest land mammal. Although it has been called the river pig, surprisingly the closest living relatives are cetaceans from which they diverged approximately 60 million years ago.
Although, when you first observed them in the water they look harmless hippopotamuses is very aggressive and unpredictable and probably is the most dangerous animal in Africa. In fact, our boat was chased by two hippopotamuses at different times. We slowly passed by these hippopotamuses when suddenly they opened their mouth and started chasing after the vessel. Also, we were observing and photographing a part of hippopotamuses for a good period when suddenly the dominant male got angry at us opened its mouth but only charged a small distance.
The habitat includes rivers, lakes, mangrove swamps. During the day they remain cool by staying in the water and mud and will emerge at dusk to graze on grasses. One morning, on land at the edge of the water there was an encounter between hippopotamuses and a Cape Buffalo, while the rest of the pod relaxed in the water.
You find Hippos in pods, but they are not social animals. Hippopotamus a territorial only in the water, a bull will preside over a small stretch of river.
Adult hippos in water can move up to 5 mph. They will sleep on the water and spontaneously rise to breathe every 3 to 5 minutes without even waking up.
It is IUCN conservation status is vulnerable.