The varied altitudes of Kibale National Park support various habitats, from thick swathes of tropical rainforest on the Fort Portal plateau, to woodland and savanna on the rift valley floor. The park is home to 70 mammal species, including 13 species of primate – the highest concentration in the whole of Africa. These primates include black-and-white colobus monkeys, grey-cheeked mangabeys and, most famously, around 1,500 chimpanzees. Chimp-tracking tours offer thrilling close encounters with troops of chimps as they swing through the forest and gather in treetops to play or doze. The park is also home to more than 375 species of birds, six of which are endemic to the region.