I got to thinking. Chimpanzees are known mainly from savannah or woodland populations, like Gombe in Tanzania, and gorillas from the highlands of Rwanda. They do live in dense rainforest too, but long-term field studies on rainforest populations have only recently begun to be publicised. And this is too bad, because it vastly under-represents Africa's biodiversity, even as far as large mammals are concerned. The observant afficionado of wildlife documentaries will have noticed that in Etosha some of the animals are a bit different from those in the Serengeti.
Geographic variation is part of biodiversity, if an under-appreciated part.
But the world of the TV documentary knows nothing of the African rainforest or its fauna, which is disappearing before our eyes without having a chance to earn its keep through tourism - or thorough knowledge of its role in ecosystem maintenance. In the rainforest there are no lions or cheetahs, no hyaenas, no wild dogs. The only large mammalian predator is the leopard. There are no wildebeest or zebras. But there are other species.