Bwindi Impenetrable National Park
The Bwindi Impenetrable National Park (BINP) is in south-western Uganda. The park is part of the Bwindi Impenetrable Forest and is situated along the Democratic Republic of the Congo (DRC) border next to the Virunga National Park and on the edge of the Albertine Rift. Composed of 331 square kilometres (128 sq. mi) of both montane and lowland forest, it is accessible only on foot. BINP is a United Nations Educational, Scientific and Cultural Organization-designated World Heritage Site.
Species diversity is a feature of the park. It provides habitat for120 species of mammals, 348 species of birds, 220 species of butterflies, 27 species of frogs, chameleons, geckos, and many endangered species. Floristically, the park is among the most diverse forests in East Africa, with more than 1,000 flowering plant species, including 163 species of trees and 104 species of ferns. The northern (low elevation) sector has many species of Guineo-Congolian flora, including two endangered species, the brown mahogany and Brazzeia longipedicellata. In particular, the area shares in the high levels of endemisms of the Albertine Rift.
The park is a sanctuary for colobus monkeys, chimpanzees, and many birds such as hornbills and turacos. It is most notable for the 340 Bwindi gorillas, half of the world's population of the critically endangered mountain gorillas. Four habituated mountain gorilla groups are open to tourism: Mubare; Habinyanja; Rushegura near
Mountain gorillas
The park is inhabited by about 340 individual mountain gorillas (Gorilla beringei beringei), known as the Bwindi population, which makes up almost half of all the mountain gorillas in the world. The rest of the worldwide mountain gorilla population is in the nearby Virunga Mountains. A 2006 census of the mountain gorilla population in the park showed that its numbers had increased modestly from an estimated 300 individuals in 1997 to 320 individuals in 2002 to 340 individuals in 2006. Disease and habitat loss are the greatest threat to the gorillas. Poaching is also a threat.
Research on the Bwindi population lags behind that of the Virunga National Park population, but some preliminary research on the Bwindi gorilla population has been carried out by Craig Stanford. This research has shown that the Bwindi gorilla's diet is markedly higher in fruit than that of the Virunga population, and that the Bwindi gorillas, even silverbacks, are more likely to climb trees to feed on foliage, fruits, and epiphytes. In some months, the Bwindi gorilla diet is very similar to that of Bwindi chimpanzees. It was also found that Bwindi gorillas travel farther per day than Virunga gorillas, particularly on days when feeding primarily on fruit than when they are feeding on fibrous foods. Additionally, Bwindi gorillas are much more likely to build their nests in trees, nearly always in Alchornea floribunda (locally, "Echizogwa"), a small understory tree.
Mountain gorillas are an endangered species, with an estimated total population of about 650 individuals.[7]:43 There are no mountain gorillas in captivity. In the 1960s and 1970s, mountain gorillas were captured to begin a population of them in captive facilities. No baby gorillas survived in captivity, and no mountain gorillas are known of that are currently in captivity.
