Nyungwe is Rwanda's largest remaining montane forest, covering the southwestern highlands, with a continuous canopy stretching across ridges and valleys near the Burundi border. The park hosts primate populations unmatched elsewhere in East Africa, including chimpanzees and other primate species. The forest also functions as a critical water catchment, feeding rivers in the Congo and Nile basins. Chimpanzees occupy the forest in habituated communities across the park. Colobus monkeys travel in large aggregations, sometimes exceeding two hundred individuals in a single troop. The forest floor supports duikers and bushbucks, while the birdlife includes Albertine Rift endemics that draw specialized birding expeditions. A suspension bridge crosses a valley at canopy level, offering aerial access to the treetops. Trail networks extend through different forest zones, from ridge walks along tea plantations at the edge to deep interior routes where multiple vegetation layers filter the light.