Tracking gorillas or chimps in the central African forest is a more single-minded pursuit than Savannah safaris. The idea is to get straight to the animals in order to make the most of your time with them. The approach is thrilling: with chimps you may hear the ear-splitting shrieks; with gorillas there’s the hollow drum-burst of a chest-beating male. The encounter can feel highly intimate, and is not soon forgotten, but primate tracking is not cheap. Natural World Safaris (01273 691642; naturalworldsafaris.com) has 10 days in Uganda with chimps at Kibali, mountain gorillas at Bwindi, plus game-viewing at Queen Elizabeth National Park for £3,535pp, excl flights.